⬇️ Things used in this video: 1. Cheap Borescope: amzn.to/2VqZQGK 2. Common Sense 3. 4k Camera: amzn.to/2HkjavH 4. Camera Microphone: amzn.to/2Evn167 5. Camera Tripod: amzn.to/2Jwog8S 6. My computer for editing / uploading: amzn.to/2uUZ3lo ⬇️Scotty’s Top DIY Tools: 1. Bluetooth Scan Tool: amzn.to/2nfvmaD 2. Cheap Scan Tool: amzn.to/2D8Tvae 3. Basic Mechanic Tool Set: amzn.to/2tEr6Ce 4. Professional Socket Set: amzn.to/2Bzmccg 5. Ratcheting Wrench Set: amzn.to/2BQjj8A 6. No Charging Required Car Jump Starter: amzn.to/2CthnUU 7. Battery Pack Car Jump Starter: amzn.to/2nrc6qR 🛠Check out the tools I use and highly recommend ► goo.gl/rwYt2y 🔥Scotty Shirts and Merch ► goo.gl/pTAeca Subscribe and hit the notification bell! ► goo.gl/CFismN Scotty on Social: Facebook ► facebook.com/scottymechanic/ Instagram ► instagram.com/scotty_the_mechanic/ Twitter ► twitter.com/Scottymechanic?lang=en
All you gotta do is gun it every chance you get and you won't have to do all the fancy stuff. I've driven a million miles on fifteen cars of different types and mileage and never had any issues.
Every time I watch him it reminds me of the story of the 3 guys captured during the war who knew a national security secret. They were tortured. After 1 hour the Frenchman gave up all he knew, after 2 hours the Swede gave up everything he had. Two days later Scotty still hadn't broken. They asked him why he didn't tell. He said he wanted to tell but they had his hands tied behind his back so he couldn't talk...
South koreans love carbon cleaning. Not because we are stupid but because 80% of the cars on the road is hyundai or kia and almost all of those hyundais and kias have gdi engines. It is such a common maintenece that carbon cleaning is bulit into the regular maintanence routine of a lot of mechanic shops.
Oh yes, you definitely need to clean up the carbon build up in a “old car.” I cleaned my fuel injectors, and intake manifold on my CRV 2000, and oh man, I wish I had done it earlier. It runs a whole lot better after the cleaning.
The coolant sprayed into WW2 engines was a water-methanol mix, and it worked in 3 ways: 1. Cooled intake air, colder air-fuel mixture in the chamber, less knock. Less knock meant you could run more boost for more power. 2. This colder charge, aside from aside from allowing more boost, allowed more dense air within the boost. 3. The methanol within the water acted as an octane booster, and water acted to inhibit combustion to reduce detonation. Thus, more boost. (or worse fuel)
I use methanol injection in my WRX to keep knock away and pull up the power levels quite considerably.Along with an intercooler sprayer as well to cool the charge air.
I've seen some Subarus with 50/50 water methanol mix setups. I personally use straight methanol due to running a JDM engine and living in a high humidity climate
Scotty Toyota had the same problem with when they first started GDI engine. And the build-up is on the valves not Pistons. You have to pull the intake off to check the valves!!
I had my dealership clean the valves cleaned with walnut shells. My car is a 2010 VW CC with 103K miles. My car had so much carbon build up it was misfiring and the opening at the intake was closed by about 50%. After it was cleaned and the oil changed. My car is easily getting 11 to12 mpg more than before. It really works.
@alexlindsey6446 They charged me $450 bucks....and I swear it was like my car gained 100 HP and gained 20 mpg....It was nuts. Just a massively positive change and worth the money.
I brought a 2008 van in 2014.. Drove it round town mostly with a few 20mile trips doing 50-70mph mostly due to speed restrictions.. my friend drove it on a 100mile trip doing mostly 80mph.. when I got back behind the wheel the next day it felt like it had an overhaul.. Was so much more responsive on the throttle so a good run can do wonders for vehicles that has just been driven round town slowly
@Spongebob Square pants #1 fan There are trillions of planets in our universe. Makes no sense that God only rules over Earth but he created the other trillions out of boredom. Obviously when you look to outer space, you realize God doesnt exist.
I did an induction service on my 08 Lexus GS 350 it has 119,000mi it was running just okey and those car are known for carbon deposits/buildup issue , after done the service at a professional mechanic the car drives like a dream 👌
absolutely insane how many things i learned from scotty! i never was into cars untill i saw him, for real! Thank you Scotty if you're seeing this :D :) :)
I remember as a kid,dad and mom blowing out our Oldsmobile 98,after driving all winter,those engines used leaded gasoline,they would carbon up so bad,it was almost unreal Scotty!!. Dad would wait for a real clear day with no snow on the roads,on the weekend of coarse,and open up the double-pumper 4-bbl.carb.,that car looked like a semi-truck with all the black smoke pouring out of the dual-exhaust system,after about 2-3 miles,the black smoke was completely gone,that V-8 had tons of power and better fuel mileage too.(fuel mileage wasn't an issue in 1955)
Yep, mom would send me out with her car and pray, wind it up in low gear, back it down, repeat until clear exhaust.... my car never had any carbon problem...
Italian tune-up really helped my F-150. It doesn't get driven very hard. I drove it at 80 miles an hour in second gear for 1 minute. It's now idling smooth as can be. Thanks Scotty. I had tried all sorts of different additives without success.
Walnut blasting works just fine and easy to do. Make sure valves are closed and a vaccum running at the same time you are cleaning the valves and it comes out looking new.
My grandpa always said “ blow the soot out of it” lol. It was funny to watch that old man hammer down on his truck every now and then after driving 25mph all the time
People make comments about Scotty using his hands to talk-like many good mechanics they're visual learners so as he's talking he's picturing the process. I do it.
Scotty, my friend is a mechanic. One day we used a BG induction system cleaner on my car. He hooked up a special sprayer in my intake boot and an air compressor. I only drive about 2 miles to work and it helped smooth out my idle a lot!
yeah Scotty dead wrong on this video you SHOULD! carbon clean your vehicle especially if its GDI , It makes a huge difference on most cars. I'd do it every 30 k on GDI. Every tune up we do gets one! Customers notice a difference every time we do one. Plus you can't use water on cars with O2 sensors cause it will probably ruin them. The BG line of products and ATS line of products are the two best for sure.
Some weeks ago a paramedic explained to me all kinds of common heart problems like ventricular fibrillation or heart attacks. I couldn't help but immediately draw comparisons to misfiring engines and piston seizures, the parallels are astounding. Doctors are really just smarter mechanics.
Scotty, I don't think you really described the inspection accurately for direct injection engines. Pulling the plug and looking through a borescope will not show you the carbon on the intake side of the valves/head, rather it shows your combustion chamber and your piston. You would have to scope through the intake manifold or remove it to see the carbon on the intake valve side. Did I miss something?
Thank you for pointing that out. You can use the scope by removing the intake temp sensor and scoping through the port (depending on its location. This goes through the intake manifold and allows you to view the valves.
Exactly, bro... Just sent him to Scotty ..he will explain everything to him.... that's why the police cars never needs to be cleaned up , because they speed fast all the time... that's not fair🤔🤔
Steven Andresson yeah it’s true it’s not fair lol cops speed all the time chasing the criminals and the getting rid of all the carbon just send them scotty when you get caught and he will explain everything :D the cops can’t do anything because when they watch Scottie’s videos they will also realise that they need to subscribe to his RUclips channel :D once they watch a few of his videos they will better understand why criminals speed and it’s not to get away from cops it’s to get rid of the carbon build up in their engine, because there’s no other way to do it but you have to be careful because once the police put the sirens on you will have to escape them :D
This is helpful in case I ever get a piston engine again, but rotary engines are a _whole different beast_ when it comes to carbon buildup; a redline a day keeps the carbon away!
@@joshrandall3632 Haha guilty, definitely more than once a day, it's just to much fun not to! Check my channel is you've never seen a supercharged RX8 :)
To check for carbon buildup on a GDI, you should pull the throttle body and check the intake valves and ports. The heat of combustion will help keep the pistons clean. Due to the airflow through the ports, there will be much more carbon there. I've seen some truly horrendous carbon deposits on valve stems and ports. The plugs and piston crowns looked fine. GDI engines suck, unless you have secondary injectors in the ports. Good for him mentioning that.
I did valve cleaning in my honda accord 2016 in 107k after loosing too much power witch has an GDI system .. removing the head and the valves was like a coal !!
@@Blaze49AzSd You can do it yourself with Seafoam spray or B-12 chemtool spray. All you have to do is take your intake apart and spray directly into the throttle body while someone revs the engine slightly so it doesn't stall. Do that several times, let it heat soak, then drive the piss out of it on the highway. Your engine will run way better after.
@@vicbrown2508 It should as long as you spray well past the maf. I have a 2.4 ecotec i've been doing this for a couple years and the valves are nearly spotless. Do this every other oil change and you'll be golden.
@@SkylineBNR34 I beg to differ. Too much risk when it's cold. It'll blow out your rear main seal if it freezes. It's only really worth doing you have a performance vehicle that has high internal turbulence due to forced induction.
Yes - Top quality gasoline and top quality oil (the recommended viscosity) can make a huge difference in performance and longevity. I speak from many miles of personal experience.
The "Beauty Cover" on most Hyundai and Kia vehicles includes a foam pad to lessen the noise from the cam driven GDI pump. Its neccessary. Without it that pump is much louder.
Yes indeed. I have a Genesis r spec and my wife has a kia optima. I used to think it was a knock in both of them, but my mechanic friend said it was just the pump . Something about the fuel pressure in these direct injected cars and that pump. I felt relieved, at least it isn't a knocking rod. lol
SCOTTY THANK FOR NOT BEATING AROUND THE BUSH!!! AND GETTING TO THE POINT" AHHHHHH YOU ARE CORRECT ABOUT CARBON CLEANERS NOTHING BUT CRICKETS AND SNAKE OIL"
It is true that intake valves build up carbon fastest, especially since they not only take in the sludge from the PCV, but also can suck oil into the manifold through the valve shaft gaskets. But: a lot of sludge will also make it into the combustion chamber and will be deposited on the pistons. I have hardly seen any GDI engine that had clogged intake valves and no deposits on the piston. If you see these, odds are that your valves look even worse. Plus, it is really easy to get into the combustion chamber as opposed to unmount the entire intake manifold. Some shops also use better borescopes that have adjustable viewing angles so you can actually get a glimpse of the intake valves.
@@svenschwingel8632 I know this is a year late, but you obviously have never seen an N54. Carbon on those valves can get so bad it’ll cause misfires, happens on average about every 50k miles.
They serve no purpose. Every car I work on I take that junk off and put it in the boot. Nobody has ever complained. Then again, few look under the bonnet anymore. They are too stupid to know what is under the bonnet.
@@CodyDoesIt - If you're using fully synthetic and changing your oil every 2k then you're throwing your money away because that oil is still good most likely unless you drive very infrequently and that oil is a year old.
I bought a 1986 Nissan Maxima from a couple so old, they bought their sandals with Jesus. The car coughed like it had asthma when I took it above 65MPH. Got a carbon cleaning and 2 years later, she still purrs like a kitten. The age of car and previous speed driven made the decision easy. Well done, Scotty.
I love your videos and advise but I don't agree with letting the outside of the engine get dirty. My step father taught me how to fix cars as soon as I could reach into the engine bay, every inch of his engine bay was clean enough to eat off. He said dirt and dust around the belts and everything else was bad, and with a clean engine you can spot a leak easier. 35 years later I still clean my engine bay every 2nd to 3rd car wash, though it's not as easy anymore with everything jammed in so tight now days. It also means you inspect everything else as well and stay on top of any potential problems.
I ruined a 01 vw tdi transmission washing the engine bay a few times. The water dribbled down shift tower into case and destroyed just rebuilt transmission so in reality i ruined two in a row before we found out what was going on. Now i am cautious on my rx hybrid cleaning engine bay but the vw bay cleaning is a no no and it rusts less with a layer of oily dirt on it. Haaaa
@@organicvids I've never have and never would use a hose to clean an engine bay. Rags and toothbrushes, with a little degreaser sprayed on and wipe off.
@@MrBiteus 45 mpg. Lots of torque with upgraded vnt 17. Last one i had i sold for 1600 with 550,000 miles on it, 2000 golf. 350,000 miles on 98 jetta tdi i sold it for 1500.
about 40 years ago my dads 1974 cadillac had carbon buildup. The mechanic mixed transmission fluid and water in a coffee cup. He slowly poured it into the carburator while the car was running, and it ran great after he was done.
Hey Scotty, I watched your throttle and IAC cleaning video this week. So I decided to clean my throttle on my 1999 Solara V6. I sprayed the crap out of the throttle and the IAC and got it clean as a bone. Turn the engine over, and it stopped turning. I Hydro locked the engine with cleaning solvent. I pulled the front three spark plugs, and sucked out about 80 mL of fluid with a syringe and tube. I was then able to get the engine to crank. I threw the spark plugs back in and now it runs fine. I guess I didn’t follow your directions very well ha ha.
Exactly, You absolutely right, I use Shell nitro gas and Castrol Titanium synthetic oil, change myself, and my 2012.mazda6 still running new with 320000km on it 👍😊Factory build new and I try to keep it new!!
Hey Scotty, Tremendous knowledge in your videos. I live in Australia and it's been a while since I haven't seen and met my dad for a while. He's overseas and don't think we can meet anytime near. But every time I see your videos, it reminds me of my dad. He worked so hard and has tremendous knowledge of cars. He lived through when the internet was not there so he isn't social media savvy but just a shout out to you for making the videos fun and engaging. My father will always put a smile on his face and do all fixes like it's good food. Keep helping and have fun !!!
I have a 2016 Audi SQ5. It has a 3.0 supercharged engine and direct injection, it absolutely needs carbon cleaning. Just had it accomplished, along with new spark plugs and engine air filter.... brand new car.
Sold my old focus with a 1st gen ecoboost with 200k km from 2011. Never needed carbon cleaning. Changed the oil every year or 10k km. During the Weekends I used to redline my car and have some fun. Car was functioning like a clock when I sold it. It was a 1.0 ecoboost 3 cylinders. Now I own a fiesta st 1.5 200hp 3 in line. Same gdi system. Ever since I bought my old ecoboost everyone told I bought a time bomb.... Some of them used to own German brands diesel crap machine. And a few of them had major problems and spend hundred of thousands of euros and they always said nothing beats a German motor bla bla bla....
My favorite excuse is when their fans say "Well you don't just afford one, you have to afford to own one". Nope, actually it's just a lazy unreliable design, because they know their clientele them will just keep throwing money in the pit. Pretty smart on the manufacturer's part TBH but funny to see people defending them.
Thanks for your information . I was thinking of taking my 2016 Mahindra KUV100 CRDI , Diesel powered car for carbon cleaning . I Drop that plan now !!! But recent days in my country (India) many small mechanics have starting making a business of doing carbon cleaning by promising lot of things. anyways.. u r doing good job for the Global people thru your Videos. kudos.
I sometimes load up these videos and double tap the screen rapidly about 20-30 times in a row for the 2 second skips. This guy just spewing out the info with his arms waving around is hilarious!
What I am seeing with a lot of this new automotive technology, is that it is great for about the length of time of the warranty period. If you plan to keep the car much longer, the thing will become a money pit. In my experience, these newer cars are not holding up as well as ones from the late 90's to about 2008. Where I see Honda Civics and Accords from the 90's to about 2004 running happily along with 200K miles or more on them, I know people with the newer Honda and Toyota cars that are having major engine and transmission issues with as little as 30K miles. And the electronics seem to now have continuous issues. This has just been my personal observations in Florida.
FarmerMiyagi I also find it ridiculous that todays trucks are so big, heavy, and uneconomical. Detroit is stuck in the past. Their car development cannot keep up with the efficiencies and reliability of foreign made cars. Atomization inside cylinder is poorer I think than port injected.
My understanding of the water/methanol injection used in WW2 fighters was that it came from a separate tank and was injected in the intake manifold to cool the intake charge as well as the piston crowns and combustion chambers which prevented detonation when the pilot selected overboost aka war emergency power. It's basically the same system GM used on the 1962 Oldsmobile Jetfire turbo.
I have always been very picky about my engines. And, I clean the crap out of them inside and out. I have a BMW 525i so, It has A LOT of plastic in the engine compartment. I clean the engine compartment so well, you can eat off the engine. And, I treat the plastic with Armor All and let it sit for several hours after before I start it back up. With 191K miles, we're still going strong.
I just ran a hose from my washer fluid tank and used a iv needle to restrict the flow and plugged the other end on a vacuum test port on the throttle....it worked as far as I could tell would go though a few liters a day of regular driving.
The Italian tune up is a great way to get your car running fine again. My mate used to make a killing doing this, old granny's and granddad would bring a car an say its running bad, well he knew that the thing had been out of second gear or past 2k rpm since new. He would take it home the long way round and thrash the thing up to the limiter, holding it high in the revs for a whole 5 miles straight an she be trailing smoke for 3.5 of um, cough and away it went. No work, free ride home, 40 quid pocket money.
Well done engineers, you improved emissions and power! If you have a GDI VW engine you can solve the carbon problem with 20$ catch can. Newer GDI cars have double the injectors, direct one's and regular ones in intake manifold. So in the end GDI is the way to go
I had an 07 mazdaspeed3 with the 2.3 direct inject turbocharged engine. Around 80k miles I ran seafoam through it. I did it through the vacuum lines and that car ran like a champ.
Yeah...nobody at Sandia National Laboratories, The Air Force Weapons Laboratory, and at least five other places with hundreds of propeller heads could possibly come up with anything as sophisticated as a carbon cleaner - never mind an atomic bomb...
My dad's P-47D Mexico's Escuadron 201, Aztec Eagles.. we fought bthe Germans too, supply fuel to USA, and plenty foot soldiers, kept the fields producing etc. I guess Trump don't read history
My brothers 2007 Chrysler 300 never went over 40 miles an hour for a few years and it failed emissions inspection, i took his car on the highway and brought it up very high and it stunk and then smoothed out and then it passed inspection the following day.
Thank you for the informative presentation by an experience mechanic. 4:15 An old time mechanic told me that one way to get rid of carbon was to drive all out up a several miles long straight uphill highway grade. That the speed and extra load of the hard working engine would blow out carbon.
Just asking, but isn’t it the top of the valve that carbon builds up on the direct injection engines not the bottom. Weren’t you looking at the bottom of the valve inside the combustion chamber.?
Scotty, you actually have to borescope through the intake manifold to see the back of the intake valves where the carbon causes most of the trouble. If you got lucky and the intake valves were maximally open, only then would you see this through the spark plug holes. Right?
My '69 Ford 302 V-8 van had a periodic problem with carbon buildup on the valves. I removed the intake manifold and manually cleaned carbon a couple times in the '70s. It ran better afterwards, but it still could not get more than 14 mpg.
I just pointed out where Scotty says it is acceptable to carbon clean your car. And in another video, Scotty says he does not advise carbon cleaning your car. So while I respect & like Scotty. Scotty is only human and Scotty goofs up sometimes!
It's like the car wax that last's a year out in the elements or makes it go faster; or it's like paying extra for nitrogen filled tires, although compressed air is 90% nitrogen anyway!
Air must be magical considering it's also 21% oxygen. Are you saying that if a lot of something (N in air) is good, more of it can't be better? Or are you saying that if a small amount of something (non-N gasses) is acceptable, eliminating them can't be better?
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Hi Scott.. what you think about Liqui Molly Cetatec ?
All you gotta do is gun it every chance you get and you won't have to do all the fancy stuff. I've driven a million miles on fifteen cars of different types and mileage and never had any issues.
Ironman Dies in endgame
@@monalisa72775 Were any of those vehicles GDI?
Scotty Kilmer common sense the most important point.
Every time I watch him it reminds me of the story of the 3 guys captured during the war who knew a national security secret. They were tortured. After 1 hour the Frenchman gave up all he knew, after 2 hours the Swede gave up everything he had. Two days later Scotty still hadn't broken. They asked him why he didn't tell. He said he wanted to tell but they had his hands tied behind his back so he couldn't talk...
Edward Paisley 😂
What war :P
that's a good one
Lol my old man just told me that joke
As someone from NJ, I can tell you this is how people talk here (including myself sometimes) , with our hands.
South koreans love carbon cleaning. Not because we are stupid but because 80% of the cars on the road is hyundai or kia and almost all of those hyundais and kias have gdi engines.
It is such a common maintenece that carbon cleaning is bulit into the regular maintanence routine of a lot of mechanic shops.
Oh yes, you definitely need to clean up the carbon build up in a “old car.” I cleaned my fuel injectors, and intake manifold on my CRV 2000, and oh man, I wish I had done it earlier. It runs a whole lot better after the cleaning.
Awesome product Bg44 k platinum
@@piedadstoffel5955 Bg44 did not help me.
How did you clean it???
@@ephesians5112 What did you use?
What did you use?
The coolant sprayed into WW2 engines was a water-methanol mix, and it worked in 3 ways:
1. Cooled intake air, colder air-fuel mixture in the chamber, less knock. Less knock meant you could run more boost for more power.
2. This colder charge, aside from aside from allowing more boost, allowed more dense air within the boost.
3. The methanol within the water acted as an octane booster, and water acted to inhibit combustion to reduce detonation. Thus, more boost. (or worse fuel)
yup
And. The water will steam clean the top end ;)
I use methanol injection in my WRX to keep knock away and pull up the power levels quite considerably.Along with an intercooler sprayer as well to cool the charge air.
Yup, the Rolls in the Mustangs had water injection I was reading for one.
Very interesting...
I've seen some Subarus with 50/50 water methanol mix setups. I personally use straight methanol due to running a JDM engine and living in a high humidity climate
Scotty Toyota had the same problem with when they first started GDI engine. And the build-up is on the valves not Pistons. You have to pull the intake off to check the valves!!
I had my dealership clean the valves cleaned with walnut shells. My car is a 2010 VW CC with 103K miles. My car had so much carbon build up it was misfiring and the opening at the intake was closed by about 50%. After it was cleaned and the oil changed. My car is easily getting 11 to12 mpg more than before. It really works.
@alexlindsey6446 They charged me $450 bucks....and I swear it was like my car gained 100 HP and gained 20 mpg....It was nuts. Just a massively positive change and worth the money.
There is a lot of physical labor involved
@@robgrt”it was nuts”. Walnuts to be exact.
Me: Hey Scotty, I'm having issues with my car, can you see what's wrong with it?
Scotty: Yes, it's not a Toyota.
or a Honda
he's not wrong...
Loooooooool
No. It’s not an OLD Toyota.
OMG Toyota is not only good option
I’ve been wondering if I really needed this for my 160,000 highway miles car. Car runs great so I’m not gonna touch a thing
Brent W. Short you shoulda changed wiring and sensors only
I brought a 2008 van in 2014..
Drove it round town mostly with a few 20mile trips doing 50-70mph mostly due to speed restrictions..
my friend drove it on a 100mile trip doing mostly 80mph..
when I got back behind the wheel the next day it felt like it had an overhaul..
Was so much more responsive on the throttle so a good run can do wonders for vehicles that has just been driven round town slowly
You mean at high revoluciones per minute...say 4.5rpms to 6rpms🤷♂️
Italian tune-up is one of my favorite activities 🤣
That’s what we told the county mounties when we were in High School, “we were just burnin’ the carbon out officer.”
HA! I remember that.
I forgot about that. You're right. I remember my old man saying let's take the car out and blow out the carbon.
Here I go learning about things I didn’t know existed!
Yeah, things like me
Yeah, me too.🙋♂️
@Spongebob Square pants #1 fan There are trillions of planets in our universe. Makes no sense that God only rules over Earth but he created the other trillions out of boredom. Obviously when you look to outer space, you realize God doesnt exist.
Daniel Iles - Yeah, me too. BTW, how did this conversation transition from internal combustion engines to the existence of GOD?
Pro tip, don't listen to guy. He often gives advice that is more likely to cause harm than prevent it
I did an induction service on my 08 Lexus GS 350 it has 119,000mi it was running just okey and those car are known for carbon deposits/buildup issue , after done the service at a professional mechanic the car drives like a dream 👌
don’t even drive your car it’ll just wear it over time- scotty kilmer 2019
Don't let your car sit. It's not good for it - Scotty Kilmer 2020.
Remove your cars seats so you dont ruin the leather
Don’t look at your car it will damage it unless of course it’s a Toyota-Scotty Kilmer
That's because he isn't a real mechanic...
Great product bg44 k platinum
Who else is pooping and watching?
That was me yesterday
🤣
@may day well the Internet includes a worldwide audience so no surprises there '-bottom feeders included.
hell yeah thats me often
Yup just started
absolutely insane how many things i learned from scotty! i never was into cars untill i saw him, for real! Thank you Scotty if you're seeing this :D :) :)
I need a Kilmer key chain or bobble head so I can carry a good mechanic with me always.
I'd definitely get one
Heat Filter the arms & hands need to bobble too 😂
Bobble head for sure!
Hey Scotty, if you're reading, make some and send me a free one. K?
Genius idea, I'd buy one!
Heh. Finally the time has come, for us, to REV UP THE ENGINE!
“REV UP YOUR ENGINE “
yeah, some stuff scotty says sounds like all engines are the same, they are not. You do need to carbon clean certain engines.
I remember as a kid,dad and mom blowing out our Oldsmobile 98,after driving all winter,those engines used leaded gasoline,they would carbon up so bad,it was almost unreal Scotty!!.
Dad would wait for a real clear day with no snow on the roads,on the weekend of coarse,and open up the double-pumper 4-bbl.carb.,that car looked like a semi-truck with all the black smoke pouring out of the dual-exhaust system,after about 2-3 miles,the black smoke was completely gone,that V-8 had tons of power and better fuel mileage too.(fuel mileage wasn't an issue in 1955)
Yep, mom would send me out with her car and pray, wind it up in low gear, back it down, repeat until clear exhaust.... my car never had any carbon problem...
Next video:
Never drive your car
You can destroy your car doing that!
Seriously...never change your oil....never properly inflate your tires…smh.
Next epsiode
Never drive anything except a Toyota Celica
Pretty much! Welcome to the show!
Next video always greets Toyota when you see one.
Italian tune-up really helped my F-150. It doesn't get driven very hard. I drove it at 80 miles an hour in second gear for 1 minute. It's now idling smooth as can be. Thanks Scotty. I had tried all sorts of different additives without success.
Great product bg44 k platinum
you must have really burned gas
Like Scotty said, use high quality gas. Specifically, only put "Top Tier" fuel in your car.
80 mph in 2nd gear? o.O
2nd gear maxes out before 60 i suppose
Walnut blasting works just fine and easy to do. Make sure valves are closed and a vaccum running at the same time you are cleaning the valves and it comes out looking new.
My grandpa always said “ blow the soot out of it” lol. It was funny to watch that old man hammer down on his truck every now and then after driving 25mph all the time
I recall seeing it come out.
SJW says that’s bad for the environment. So do it.
Don't tell AOC!
@@jeffnorbert1871 Haha!! Freaking Cow Fart Cortez, SMH!!
Never fails. Someone finds a way to turn ANYTHING political.
People make comments about Scotty using his hands to talk-like many good mechanics they're visual learners so as he's talking he's picturing the process. I do it.
Scotty, my friend is a mechanic. One day we used a BG induction system cleaner on my car.
He hooked up a special sprayer in my intake boot and an air compressor.
I only drive about 2 miles to work and it helped smooth out my idle a lot!
Great product bg44 k platinum
yeah Scotty dead wrong on this video you SHOULD! carbon clean your vehicle especially if its GDI , It makes a huge difference on most cars. I'd do it every 30 k on GDI. Every tune up we do gets one! Customers notice a difference every time we do one. Plus you can't use water on cars with O2 sensors cause it will probably ruin them. The BG line of products and ATS line of products are the two best for sure.
I agree. First time I disagree with Scotty. You should routinely use the BG intake cleaner on your GDI.
I love how scotty is always swinging his arms around
We used the 3C machine at our shop from ATS on a ton of VW and BMW's. It works fantastic! Way better then pulling the intake manifold.
how much is a cleaning with that on average?
Ive been a professional mechanic for 20 years. U sir are fun to watch and spot on
@Alpha Tech
Yep...hes in his 60s
Hi kyle, do you suggest carbon cleaning by h20 technology or not?
Carbon in engines have a striking similarity to high blood pressure
Atherosclerosis
Some weeks ago a paramedic explained to me all kinds of common heart problems like ventricular fibrillation or heart attacks. I couldn't help but immediately draw comparisons to misfiring engines and piston seizures, the parallels are astounding. Doctors are really just smarter mechanics.
King Kong and more precise when putting people back together.
Stop taking your car to McDonald's!
@@KingKong-mp6gj difference between a doctor and a mechanic is mechanic washes his hands before using the bathroom
Scotty, I don't think you really described the inspection accurately for direct injection engines. Pulling the plug and looking through a borescope will not show you the carbon on the intake side of the valves/head, rather it shows your combustion chamber and your piston. You would have to scope through the intake manifold or remove it to see the carbon on the intake valve side. Did I miss something?
Thank you for pointing that out. You can use the scope by removing the intake temp sensor and scoping through the port (depending on its location. This goes through the intake manifold and allows you to view the valves.
Police: why u speed so fast son??
Dude: Scotty killme said carbon needs come out 😁😎
Exactly, bro... Just sent him to Scotty ..he will explain everything to him.... that's why the police cars never needs to be cleaned up , because they speed fast all the time... that's not fair🤔🤔
Steven Andresson yeah it’s true it’s not fair lol cops speed all the time chasing the criminals and the getting rid of all the carbon just send them scotty when you get caught and he will explain everything :D the cops can’t do anything because when they watch Scottie’s videos they will also realise that they need to subscribe to his RUclips channel :D once they watch a few of his videos they will better understand why criminals speed and it’s not to get away from cops it’s to get rid of the carbon build up in their engine, because there’s no other way to do it but you have to be careful because once the police put the sirens on you will have to escape them :D
@@stevenandresson2368 but you have to realize they need to be places, so technically it is fair
@@ambitionsskyyyy. But Hey, Criminals have an inalienable Constitutional Right to a Clean Getaway with a Carbon Free Car!
I got a speedn ticket doing that!! Heard ping, got pissed. Got ticket!!
This is helpful in case I ever get a piston engine again, but rotary engines are a _whole different beast_ when it comes to carbon buildup; a redline a day keeps the carbon away!
So you're going to sit there, presumably with a straight face, and tell the world you only redline your rotary engine once a day?
@@joshrandall3632 Haha guilty, definitely more than once a day, it's just to much fun not to! Check my channel is you've never seen a supercharged RX8 :)
@@VisionQuest057 That sounds tasty. I'll definitely have a look at it. Always had a thing for the Gen 3 RX7s.
I love Scotty, he's told that Camry station wagon story more than once on a video
lol we par "carbon tax" in Canada.. If I pay for my carbon, I want to keep it :)
Start by feeding the exhaust pipe back into the passenger cabin.
@Harry Wang That was a very funny🤣👌
I want to save it to make statues for my front yard
Sounds loon-y to me.
So, if you save the carbon and take it to the government, you should be able to get some of your tax money back.
I’m convinced Scotty’s Celica is a hologram
c k Even more impressive he can jump out of the trunk if what you say is true 😄
@@lutherabel2618 Advanced acrobatics
The moon too ^^
Luther Abel lol I think it’s just a cardboard box painted to resemble a Celica
@@christos881 I would still buy it with his autograph on the cardboard hood.
Your videos still making a difference 5 years on. Love from Ghana!!!
To check for carbon buildup on a GDI, you should pull the throttle body and check the intake valves and ports. The heat of combustion will help keep the pistons clean. Due to the airflow through the ports, there will be much more carbon there. I've seen some truly horrendous carbon deposits on valve stems and ports. The plugs and piston crowns looked fine. GDI engines suck, unless you have secondary injectors in the ports. Good for him mentioning that.
I did valve cleaning in my honda accord 2016 in 107k after loosing too much power witch has an GDI system .. removing the head and the valves was like a coal !!
How much to pull the heads and have a mechanic do the cleaning? Thanks Scotty
@@Blaze49AzSd You can do it yourself with Seafoam spray or B-12 chemtool spray. All you have to do is take your intake apart and spray directly into the throttle body while someone revs the engine slightly so it doesn't stall. Do that several times, let it heat soak, then drive the piss out of it on the highway. Your engine will run way better after.
@@joshn938 are you saying this works for direct injection engines like the 4.2 audi v8 ?
@@vicbrown2508 It should as long as you spray well past the maf. I have a 2.4 ecotec i've been doing this for a couple years and the valves are nearly spotless. Do this every other oil change and you'll be golden.
I use CRC GDI IDV Intake valve & turbo cleaner in my 2015 Honda Accord through the brake booster port on the intake manifold. The stuff works great!
I absolutely LOVE the little popup pictures! LMAO!!! Great videos and great editing!
installing additional oil catcher also helps prevent carbon buildups
Yes but it isnt necessary. When living in colder climates they tend to freeze due to water mixed in which can blow the rear main seal.
@@shteve3092 Clean out your catch can regularly and you wouldn't have a problem.
@@SkylineBNR34 I beg to differ. Too much risk when it's cold. It'll blow out your rear main seal if it freezes. It's only really worth doing you have a performance vehicle that has high internal turbulence due to forced induction.
Mann provent200. Filter with bypasses that puts the oil back in the pan.
I would run a catch can and just put a vent in the oil fill cap or somthing if I was worried about freezing water.
I followed your advice, I bought a ‘13 Camry XLE , only 80k , four cylinder , I am the happiest driver ever 😃
Guy on the bang bus would disagree
deasttn lmao
Water injection in high output engine cools the intake charge to prevent engine damage due to detonation.
Yes - Top quality gasoline and top quality oil (the recommended viscosity) can make a huge difference in performance and longevity. I speak from many miles of personal experience.
What is top quality gasoline ?
So recommend based on owners manual?
Some say that GDI engines are so carboned up, China wants to open new coal mines inside of them.
Good one.
Haha nice!! Sounds like a line from Jeremy Clarkson.
That would be Trump
😂😂😂
😂😂 I don’t usually laugh that much from a comment , but that was good . I could see Scotty saying that about any non Toyota
One of the best RUclipsrs out here man.
The "Beauty Cover" on most Hyundai and Kia vehicles includes a foam pad to lessen the noise from the cam driven GDI pump. Its neccessary. Without it that pump is much louder.
Yes indeed. I have a Genesis r spec and my wife has a kia optima. I used to think it was a knock in both of them, but my mechanic friend said it was just the pump . Something about the fuel pressure in these direct injected cars and that pump. I felt relieved, at least it isn't a knocking rod. lol
Scotty Kilmezr is sponsored by the 1994 Toyota Celica
This guys a fuckin cave man
Learn to spell.
@@mistermeanor968 No he is not. He has this car because he is curious to see how long will this car last. He has other cars too.
SCOTTY THANK FOR NOT BEATING AROUND THE BUSH!!! AND GETTING TO THE POINT"
AHHHHHH YOU ARE CORRECT ABOUT CARBON CLEANERS NOTHING BUT CRICKETS AND SNAKE OIL"
Nice borescope view but it really doesn't show the real GDI problems which is carbon build up on the intake valves.
It is true that intake valves build up carbon fastest, especially since they not only take in the sludge from the PCV, but also can suck oil into the manifold through the valve shaft gaskets.
But: a lot of sludge will also make it into the combustion chamber and will be deposited on the pistons. I have hardly seen any GDI engine that had clogged intake valves and no deposits on the piston. If you see these, odds are that your valves look even worse. Plus, it is really easy to get into the combustion chamber as opposed to unmount the entire intake manifold.
Some shops also use better borescopes that have adjustable viewing angles so you can actually get a glimpse of the intake valves.
You sound paranoid.
What about skyactiv Mazda?
@@svenschwingel8632 I know this is a year late, but you obviously have never seen an N54. Carbon on those valves can get so bad it’ll cause misfires, happens on average about every 50k miles.
@@dave6933 I wouldn't doubt that for a second
‘Stupid beauty cover’ 😂😂
Classic scotty
😂🤣I read this comment as he was saying it. 😂🤣
They serve no purpose. Every car I work on I take that junk off and put it in the boot. Nobody has ever complained. Then again, few look under the bonnet anymore. They are too stupid to know what is under the bonnet.
yes, they are for looks,USA
Honda claim the one on the I CDTI Engine is for sound deadening. Not sure I believe them
They are supposed to be acoustic covers
Three short years later he’s promoting his buddies carbon cleaning product..
🤣🤣🤣
What I came to the comments to say.
100%
This man's knowledge surprises me, every time I get some new information.
think someone carbon cleaned scotty, he got way more power today! ;-)
@P. Spit Left-handed compliment.
Only for idiots I change oil every 2k with synthetic and use a catch can. But yes it is a racket
@@CodyDoesIt - If you're using fully synthetic and changing your oil every 2k then you're throwing your money away because that oil is still good most likely unless you drive very infrequently and that oil is a year old.
CodyDoesIt I haven't changed my oil in about 80k miles. Car runs fine.
@@duketogo2616 i drive my car hard which breaks the oil down quicker not to mention I work in a shop... its cheap for me
I bought a 1986 Nissan Maxima from a couple so old, they bought their sandals with Jesus. The car coughed like it had asthma when I took it above 65MPH. Got a carbon cleaning and 2 years later, she still purrs like a kitten.
The age of car and previous speed driven made the decision easy. Well done, Scotty.
I love your videos and advise but I don't agree with letting the outside of the engine get dirty. My step father taught me how to fix cars as soon as I could reach into the engine bay, every inch of his engine bay was clean enough to eat off. He said dirt and dust around the belts and everything else was bad, and with a clean engine you can spot a leak easier. 35 years later I still clean my engine bay every 2nd to 3rd car wash, though it's not as easy anymore with everything jammed in so tight now days. It also means you inspect everything else as well and stay on top of any potential problems.
I ruined a 01 vw tdi transmission washing the engine bay a few times. The water dribbled down shift tower into case and destroyed just rebuilt transmission so in reality i ruined two in a row before we found out what was going on. Now i am cautious on my rx hybrid cleaning engine bay but the vw bay cleaning is a no no and it rusts less with a layer of oily dirt on it. Haaaa
@@organicvids I've never have and never would use a hose to clean an engine bay. Rags and toothbrushes, with a little degreaser sprayed on and wipe off.
@@MrBiteus you have never owned a turbo vw diesel. Haa oil leaking sieves. There are not enough rags on the planet. Haaaa
@@organicvids Yeah they are well known for oil leaks and check engine lights.
I'd love to drive one not own one.
@@MrBiteus 45 mpg. Lots of torque with upgraded vnt 17. Last one i had i sold for 1600 with 550,000 miles on it, 2000 golf. 350,000 miles on 98 jetta tdi i sold it for 1500.
about 40 years ago my dads 1974 cadillac had carbon buildup. The mechanic mixed transmission fluid and water in a coffee cup. He slowly poured it into the carburator while the car was running, and it ran great after he was done.
I wish you were right on this one Scotty. Carbon cleaning is very necessary on some cars
I love you Scotty. Helped me out a lot with these videos over the years. I've saved a lot of money, and had a lot of fun working on my own cars.
Hey Scotty, I watched your throttle and IAC cleaning video this week. So I decided to clean my throttle on my 1999 Solara V6. I sprayed the crap out of the throttle and the IAC and got it clean as a bone. Turn the engine over, and it stopped turning.
I Hydro locked the engine with cleaning solvent. I pulled the front three spark plugs, and sucked out about 80 mL of fluid with a syringe and tube. I was then able to get the engine to crank. I threw the spark plugs back in and now it runs fine. I guess I didn’t follow your directions very well ha ha.
Dude....Realy?????
Good way to bend a connecting rod/major damage there....Bad bad deal....
Exactly, You absolutely right, I use Shell nitro gas and Castrol Titanium synthetic oil, change myself, and my 2012.mazda6 still running new with 320000km on it 👍😊Factory build new and I try to keep it new!!
Hey Scotty,
Tremendous knowledge in your videos. I live in Australia and it's been a while since I haven't seen and met my dad for a while. He's overseas and don't think we can meet anytime near. But every time I see your videos, it reminds me of my dad. He worked so hard and has tremendous knowledge of cars. He lived through when the internet was not there so he isn't social media savvy but just a shout out to you for making the videos fun and engaging. My father will always put a smile on his face and do all fixes like it's good food. Keep helping and have fun !!!
yeah, pity he reads it all from a script lol.
Same here. Reminds me of my old man every time. He worked for Honda for 35 years and did nothing but bag Euros as well.. haha
Intake Carbon cleaning is literally *MANDATORY* for the GTI/ Golf R.
Yep! Also for Audi and Porsche. If you have direct injection the valves must be scraped, period.
And bmw.....
Any Direct Inject cars does on the intake valves
@@stevenyia2778 Not all GDI engines are having carbon buildup.
@@benjaminwayneb Can you name some?
I have a 2016 Audi SQ5. It has a 3.0 supercharged engine and direct injection, it absolutely needs carbon cleaning. Just had it accomplished, along with new spark plugs and engine air filter.... brand new car.
Sold my old focus with a 1st gen ecoboost with 200k km from 2011. Never needed carbon cleaning. Changed the oil every year or 10k km. During the Weekends I used to redline my car and have some fun. Car was functioning like a clock when I sold it. It was a 1.0 ecoboost 3 cylinders. Now I own a fiesta st 1.5 200hp 3 in line. Same gdi system. Ever since I bought my old ecoboost everyone told I bought a time bomb.... Some of them used to own German brands diesel crap machine. And a few of them had major problems and spend hundred of thousands of euros and they always said nothing beats a German motor bla bla bla....
My favorite excuse is when their fans say "Well you don't just afford one, you have to afford to own one". Nope, actually it's just a lazy unreliable design, because they know their clientele them will just keep throwing money in the pit. Pretty smart on the manufacturer's part TBH but funny to see people defending them.
Thanks for your information . I was thinking of taking my 2016 Mahindra KUV100 CRDI , Diesel powered car for carbon cleaning . I Drop that plan now !!! But recent days in my country (India) many small mechanics have starting making a business of doing carbon cleaning by promising lot of things. anyways.. u r doing good job for the Global people thru your Videos. kudos.
I sometimes load up these videos and double tap the screen rapidly about 20-30 times in a row for the 2 second skips. This guy just spewing out the info with his arms waving around is hilarious!
What I am seeing with a lot of this new automotive technology, is that it is great
for about the length of time of the warranty period. If you plan to keep the car much
longer, the thing will become a money pit. In my experience, these
newer cars are not holding up as well as ones from the late 90's to about 2008.
Where I see Honda Civics and Accords from the 90's to about 2004 running
happily along with 200K miles or more on them, I know people with the newer
Honda and Toyota cars that are having major engine and transmission
issues with as little as 30K miles. And the electronics seem to now have
continuous issues. This has just been my personal observations in Florida.
FarmerMiyagi I also find it ridiculous that todays trucks are so big, heavy, and uneconomical. Detroit is stuck in the past. Their car development cannot keep up with the efficiencies and reliability of foreign made cars. Atomization inside cylinder is poorer I think than port injected.
My understanding of the water/methanol injection used in WW2 fighters was that it came from a separate tank and was injected in the intake manifold to cool the intake charge as well as the piston crowns and combustion chambers which prevented detonation when the pilot selected overboost aka war emergency power. It's basically the same system GM used on the 1962 Oldsmobile Jetfire turbo.
I have always been very picky about my engines. And, I clean the crap out of them inside and out. I have a BMW 525i so, It has A LOT of plastic in the engine compartment. I clean the engine compartment so well, you can eat off the engine. And, I treat the plastic with Armor All and let it sit for several hours after before I start it back up. With 191K miles, we're still going strong.
BTW the castrol GTX ultra clean shown in the video is a semi-synthetic oil not fully synthetic!, but it actually cleans carbons depotsits...
Changing synthetic oil at 3,000 miles is a total waste of money. Totally.
@@QuantumRift No really. At least the lubrication is at it's highest, therefore, less likely to have metal wearing ;)
Scotty is like that crazy old mechanic uncle that just rambles on about cars for hours that I never had.
It's true, and yet you can't help listening.
I just ran a hose from my washer fluid tank and used a iv needle to restrict the flow and plugged the other end on a vacuum test port on the throttle....it worked as far as I could tell would go though a few liters a day of regular driving.
The Italian Tune Up. My old mechanic used to tell me to do this. Never understood the concept. Makes sense now.
The Italian tune up is a great way to get your car running fine again. My mate used to make a killing doing this, old granny's and granddad would bring a car an say its running bad, well he knew that the thing had been out of second gear or past 2k rpm since new. He would take it home the long way round and thrash the thing up to the limiter, holding it high in the revs for a whole 5 miles straight an she be trailing smoke for 3.5 of um, cough and away it went. No work, free ride home, 40 quid pocket money.
Daniel Kelly Does not help on GDI engines...
GDI ... introducing diesel engine problems to the gasoline engine. Well done eco-nuts. Well done.
Well done engineers, you improved emissions and power! If you have a GDI VW engine you can solve the carbon problem with 20$ catch can. Newer GDI cars have double the injectors, direct one's and regular ones in intake manifold. So in the end GDI is the way to go
I had an 07 mazdaspeed3 with the 2.3 direct inject turbocharged engine. Around 80k miles I ran seafoam through it. I did it through the vacuum lines and that car ran like a champ.
A clean engine on the outside helps engine run cooler longer. Prevention of rust and wear.
I'm reving up my carbon and blowing up my engine since I've saw this video , thanks Scotty
Damn and here I thought I was the last dude that had to use Walnut shells to try and clean something that way got a lot of respect for you Scotty
I guess Albuquerque is known for its ... ahem.. chemical engineering
Jabid21 I just started watching Walter white and his purist most purist blue meth. Heisenberg lol
Yeah...nobody at Sandia National Laboratories, The Air Force Weapons Laboratory, and at least five other places with hundreds of propeller heads could possibly come up with anything as sophisticated as a carbon cleaner - never mind an atomic bomb...
🤣 I lived there for a decade, man roasting my beloved home.
Really !
Albuquerque is known for Albuquerque man!
Scotty, Do a video showing carbon buildup in a GDI engine and show us the carbon deposits with your borescope. Thanks!
Scotty the real deal Cuban mechanic ! 👏👏👏
Hey! That’s my father’s P-47 Thunderbolt! Long live the 367th!
My dad's P-47D Mexico's Escuadron 201, Aztec Eagles.. we fought bthe Germans too, supply fuel to USA, and plenty foot soldiers, kept the fields producing etc. I guess Trump don't read history
Idk. I used sea foam and shot it into the throttle body and it definitely helped 🤷🏻♂️
mine too
on a lot of the GDI motors a 3 part fuel injection cleaning service cleans those valves right up.
Love your videos but you have to scope the intake not the cylinder on GDI engines.
My brothers 2007 Chrysler 300 never went over 40 miles an hour for a few years and it failed emissions inspection, i took his car on the highway and brought it up very high and it stunk and then smoothed out and then it passed inspection the following day.
Sounds like an Italian tune up
Thank you for the informative presentation by an experience mechanic.
4:15 An old time mechanic told me that one way to get rid of carbon was to drive all out up a several miles long straight uphill highway grade. That the speed and extra load of the hard working engine would blow out carbon.
Italian tune up ?
I love ending up here after watching tons of happy sea foam customer videos.
Why cant this guy stay in one place 😂
Meth and a lot of knowledge.
On android or PC, turn up the playback speed to 1.5x. You can thank me later.
Hr is too awesome to sit idlely by to watch the world go by.
vr6isfaster best idea ever, also this works on IOS devices as well😂
To much caffeine.
Just asking, but isn’t it the top of the valve that carbon builds up on the direct injection engines not the bottom. Weren’t you looking at the bottom of the valve inside the combustion chamber.?
Scotty, you actually have to borescope through the intake manifold to see the back of the intake valves where the carbon causes most of the trouble. If you got lucky and the intake valves were maximally open, only then would you see this through the spark plug holes. Right?
correct.
Hey Scotty how old is your Tuxedo cat? Mine is about 8 or so. He's sleeping on our van seat that we keep on the porch lol.
Even your Cat can do it !!!!!
??? Rev up your engines "shows cat purring"
@@arzdaman purr your engines!!
What I wanna know is who does the video Editing? Does Scotty Do it? Does he choose the memes too?
His cat's name is Lucy.
Scotty, you are a legend. Lots of love from Turkey.
Watching Scotty videos is as close as I come to being friends with him and boy would I love that!
Same.
Good video Scotty.....
in Australia we call the beauty cover as you refer to it instead we say barbecue plate
Never heard one person in Australia calling it that. Cool story bro
My '69 Ford 302 V-8 van had a periodic problem with carbon buildup on the valves. I removed the intake manifold and manually cleaned carbon a couple times in the '70s. It ran better afterwards, but it still could not get more than 14 mpg.
I wish you were my neighbor Scotty! You're a treasure of knowledge. I respect you A LOT
thisnametooktolong name somewhere Scotty is wrong. Only channel that knows everything
I just pointed out where Scotty says it is acceptable to carbon clean your car. And in another video, Scotty says he does not advise carbon cleaning your car. So while I respect & like Scotty. Scotty is only human and Scotty goofs up sometimes!
@@thisnametooktolong I remember the video where he was using a timing light to check a cam belt! Hilarious, but completely wrong.
It's like the car wax that last's a year out in the elements or makes it go faster; or it's like paying extra for nitrogen filled tires, although compressed air is 90% nitrogen anyway!
Air must be magical considering it's also 21% oxygen.
Are you saying that if a lot of something (N in air) is good, more of it can't be better? Or are you saying that if a small amount of something (non-N gasses) is acceptable, eliminating them can't be better?
I know I can always stop by to listen to Scotty for some real reasonable advice that'll help save me some money. 😄