Very informative. Not really for me since I worked at a Chrysler dealer for 10 years and have owned a 2004 WJ for 5 years, but you covered some really good points that the average consumer may not know to get the best mileage from the 4.0. I couldn’t agree more about running plugs the vehicle came with and change every 30k. You’re asking for problems if you don’t. Mine uses NGK but Chrysler has also used Champion. I have the plug numbers from the dealer and bought the same ones from Parts Plus for much cheaper. Also I get Purolator oil filters in bulk from Advance Auto Parts, they are the supplier for the Mopar 090 and many other Chrysler filters. Much cheaper for the same filter. I get about 16 average and 21 freeway with an all stock WJ with 3.73 gears and 250k miles
I had a 2005 TJ Rubicon and averaged 19 mpg until 30k miles when the plugs went bad. I checked each plug and the gap had widened to 0.085 due to use. A new set of plugs brought the mileage back.
Just wanted to let you know that I subscribed to your channel. I like your content . My TJ with basically everything you have done with the exception of the chip and I'm getting between 12.5 to 13.5 mpg . I'm still only running 33'' tires right now .but plan on going to 35s once I find a dana 44 rear end . Anyways looking forward to more of your videos. Take care .
I changed my plugs last month and i went from 11 to 13 to almost 17 mpg city driving and 20 highway and I have a 2000 wrangler 4.0 and all stock and automatic trans. I do have the the same gears and 30x9.5x15 at tires and I'm using the double platinum champion 7034 plugs. I also use valvoline 10w30 oil and I fill mine up with 87 octane gas
I was going to install a Thor cowl cold air intake but many have said it is insanely loud and had to remove it. What about installing a Daystar type hood vent above the air box to allow colder air in the engine? Just like on the concept Jeep Nacho, you would have to fabricate a close seal clip on for rain and snow.
Cold air intakes make very little difference to fuel mileage and power on the 4.0. What I believe you are talking about is making a ram air intake, how ever I would be concerned about water crossing. If you want more power I suggest a supercharger, if you want better gas, keep your factory intake and try a k&n or similar filter, paired with a 62mm throttle body.
@@JeepinBubba I don't water cross but do go beach and dune wheelin when I can. CAI are for gullible consumers. Clearly they are useless and in most cases are harmful to your engine. I think the hood vent above the air box opening is something worth doing once I can find a fabricator to make a sealer attachment on rain and snow days.
@@JeepTJWheelin ik this is a year old lol but i’m having heat problems on mine too, nothing serious but it just gets too damn hot. 110 + humidity + black jeep. gonna get an aluminum radiator and an aftermarket fan on my ‘05 auto tj.
@@mcbaited5455 I put a hood vent on my '05 TJ Rocky Mtn, hood scoop and just ordered a heat soak kit. Next will be getting the Mopar Jeep air box hood vent. I have a black '05 auto TJ too.
I did the math with premium gas and unleaded and you’re only saving $1.75 per 250 miles. So buying premium is saving you money. Unleaded at $3.31 at 250 miles 25 gallons average of 10mpg comes out to $82.75 premium at $4.05 250 miles 20 gallons at average 12mpg is $81.00. And i can imagine with the superchips premium tune you could maybe squeeze another half mile or mile outta that average. I think I might start using premium 😂
I was able to get 14.5 mpg out of it. However it now has 37s and a new owner so maybe I should do a video on my current JEEP. Enjoy, and if you can run premium, it doesn't hurt.
@@jampakunchog every now and then shouldn’t cause an issue, but when I bought my TJ a few weeks ago I researched it just to make sure and read articles and they all say to use 87 octane. They didn’t give an explanation as to why though. But definitely do what I said and check your owners manual if you are unsure.
@@johncena2336 I have seen that if you run 91 then yes you are right. However, with 89 the engine runs smoother and I do get 15mpg instead of 12 mpg. 91 octane requires greater compression because it is a more stable fuel
Very informative. Not really for me since I worked at a Chrysler dealer for 10 years and have owned a 2004 WJ for 5 years, but you covered some really good points that the average consumer may not know to get the best mileage from the 4.0. I couldn’t agree more about running plugs the vehicle came with and change every 30k. You’re asking for problems if you don’t. Mine uses NGK but Chrysler has also used Champion. I have the plug numbers from the dealer and bought the same ones from Parts Plus for much cheaper. Also I get Purolator oil filters in bulk from Advance Auto Parts, they are the supplier for the Mopar 090 and many other Chrysler filters. Much cheaper for the same filter. I get about 16 average and 21 freeway with an all stock WJ with 3.73 gears and 250k miles
!!! tire size? If I got that mpg I might be able to keep my jeep!
What’s the best air filter for 97 TJ 4.0
How the heck do you get 21? Tiny tires?
I had a 2005 TJ Rubicon and averaged 19 mpg until 30k miles when the plugs went bad. I checked each plug and the gap had widened to 0.085 due to use. A new set of plugs brought the mileage back.
Just wanted to let you know that I subscribed to your channel. I like your content . My TJ with basically everything you have done with the exception of the chip and I'm getting between 12.5 to 13.5 mpg . I'm still only running 33'' tires right now .but plan on going to 35s once I find a dana 44 rear end . Anyways looking forward to more of your videos. Take care .
Thanks for subscribing. I am not sure if maybe my hardtop help some, plus I dont fast often.
Does the cold air cone filter add on really help
it really depends on the brand and the cold air setup, if it's truly getting cold air, then sure it can help.
I changed my plugs last month and i went from 11 to 13 to almost 17 mpg city driving and 20 highway and I have a 2000 wrangler 4.0 and all stock and automatic trans. I do have the the same gears and 30x9.5x15 at tires and I'm using the double platinum champion 7034 plugs. I also use valvoline 10w30 oil and I fill mine up with 87 octane gas
Yeah those 30" tires are gas savers vs. My 35s. Plugs made a big difference. Thanks for the feedback.
did you recalabrate your spedo for the tire dia. increase? if not your odometer is incorrect;
I did
I was going to install a Thor cowl cold air intake but many have said it is insanely loud and had to remove it. What about installing a Daystar type hood vent above the air box to allow colder air in the engine? Just like on the concept Jeep Nacho, you would have to fabricate a close seal clip on for rain and snow.
Cold air intakes make very little difference to fuel mileage and power on the 4.0. What I believe you are talking about is making a ram air intake, how ever I would be concerned about water crossing. If you want more power I suggest a supercharger, if you want better gas, keep your factory intake and try a k&n or similar filter, paired with a 62mm throttle body.
@@JeepinBubba I don't water cross but do go beach and dune wheelin when I can. CAI are for gullible consumers. Clearly they are useless and in most cases are harmful to your engine. I think the hood vent above the air box opening is something worth doing once I can find a fabricator to make a sealer attachment on rain and snow days.
@@JeepTJWheelin ik this is a year old lol but i’m having heat problems on mine too, nothing serious but it just gets too damn hot. 110 + humidity + black jeep. gonna get an aluminum radiator and an aftermarket fan on my ‘05 auto tj.
@@mcbaited5455 I put a hood vent on my '05 TJ Rocky Mtn, hood scoop and just ordered a heat soak kit. Next will be getting the Mopar Jeep air box hood vent. I have a black '05 auto TJ too.
I get 17-19 MPG on my 4.0 if mostly highway
Are you local to Georgia? I noticed you go to caffeine and octane a lot
Born in Buford, Graduated Buford in 07, moved to Michigan for 2 years to work for JCR and then opened Black Bear Off-Road in Buford in March of 2020.
so yeah haha local
I can run low grade gas in my 4.0 6 cylinder. I get 16-17 mpg driving 60 mpg. It’s the sport and has the bigger tires.
Driving at 60 mph helps.
I just bought a jeep and I saw that light under the hood mine is not plugged in and I noticed yours is on can you help me
Just plug it in, if it doesnt work you may need a nee fuse or bulb.
I did the math with premium gas and unleaded and you’re only saving $1.75 per 250 miles. So buying premium is saving you money. Unleaded at $3.31 at 250 miles 25 gallons average of 10mpg comes out to $82.75
premium at $4.05 250 miles 20 gallons at average 12mpg is $81.00. And i can imagine with the superchips premium tune you could maybe squeeze another half mile or mile outta that average. I think I might start using premium 😂
I was able to get 14.5 mpg out of it. However it now has 37s and a new owner so maybe I should do a video on my current JEEP. Enjoy, and if you can run premium, it doesn't hurt.
I'm gettin 11.4 right now. WTF ?
3.8L 2010 Sahara Unlimited.
Is your speedo calibrated properly for your tire size? Do you have larger tires on stick gears?
The super chips don’t work on older wranglers, they’re pretty much optimized from stock unless you have things like supercharger or turbos on ut
I actually noticed a small difference, but nothing huge. I still like having it to check codes and to watch gauges sometimes.
I use 89 octane and I do getter mileage than using 87 octane. 2000 jeep sport tj. I don't know why but I have improved to over 15 mpg.
If you read your owners manual they say to use only 87 octane fuel and not to use 89.
@@johncena2336 You have to explain why. If this doesn't cause a pinging to the engine then there should be no problem. Need more info
@@jampakunchog every now and then shouldn’t cause an issue, but when I bought my TJ a few weeks ago I researched it just to make sure and read articles and they all say to use 87 octane. They didn’t give an explanation as to why though. But definitely do what I said and check your owners manual if you are unsure.
@@johncena2336 I have seen that if you run 91 then yes you are right. However, with 89 the engine runs smoother and I do get 15mpg instead of 12 mpg. 91 octane requires greater compression because it is a more stable fuel
@@johncena2336 I will take that under advice, thanks for your concern. It could be harmful maybe after extensive use
I hate my spectre . I had an Airaid before and it was way better.
I got a super idea of fixing your jeep fuel economy!!!
Get a fucking prius
AMSOIL works well for me. 7348558