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So what is the issue with <20psi oil at idle in modern engines? Is the thin oil somehow not providing enough lubrication at low pressures because of inadequate shear performance or something? BMW M20s - some of BMW's best engines ever from their era of long lasting cars, have always been plagued with low oil pressure at hot idle, but have incredible longevity, 200,000mi+ with ease as long as you keep up with the timing belt and don't overheat them. I've been very hard on M20s over the years, turbo builds, track use and they have horrible oil pressure at idle; 10-15psi at idle with hot oil even using Mobil1 15W50. Using a thinner oil you'll see 7-10psi. I've still never had one fail because of bearings, only rings going bad on a nearly 300,000mi engine, and a couple of rockers failing from track use.

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So I have done the injectors, the oil cooler and manifold on a OM642 will have you look in to the oil pressure issue

I just circumvent this buy buying Hondas

Would love to see you review the best Mercedes engines (both Diesel and gasoline)!

Yall act like new engines don’t make it many more miles, have double the mpg, and more low-end torque than ever, because y’all are scared of change.

Thank you for very very interesting video! However, I bet that the measurement units of thsi video confuse most of the viewers. Since the politics mainly in European Union are much more stricter than elsewhere, I assume that most of the viewers are from Europe. However, Europeans don't use imperial units and have no clue about PSI or fahrenheits etc. If you want to be international, could you please include the both units? Vielen Dank für ganz ganz interessantes Videos!

sank you for travelling wis Deutsche Bahn!

I have the M113 V8 glad for that🙂

Sorry, but here is the truth. ICE is a dead technology, and whether we like it or not, electric is the future. Fuel will keep getting more and more expensive, pay isnt increasing at the same level and modern ICE cars suck. All these reasons combined will move the industry slowing over to electricity. Plus, frankly speaking, we need to take climate change more seriously, and it's already too late.

Car weight and size have ballooned while manufacturers have chased both higher power outputs and efficiency.

Psi, Fahrenheit,...😢

Just for context this video isn’t referring to American engines, those are to big! And have now power lol

Ok but do modern engines actually last shorter than older ones? Do we have any numbers on this? Most arguments I read about this are full of survivorship bias. There are good ones and bad ones among both old and modern cars. If you look at old cars still around today, obviously those were the good ones. The bad old cars are already long gone and forgotten.

Even with the M157, Mercedes reverted back to iron sleeve in place of alucil

Most taxis in Romania are Dacia Sandero equipped with a 3 cylinder 1 liter turbocharged engine. Sanderos going strong after reaching 500000 km are a common sight.

I bought last generation engine vehicles that no longer are being produced

How *Liberals* Destroyed Great Engines

*laughs in hilux turbodiesel*

you are a EU channel, do NOT use the silly, antiquated amerikan measurement system please

EU destroyed whole economics sector, milions jobs lose. Incompetent people.

0:47 to be fair if not usen for short distances and an oil change (0w40 or 5w40 at least) every 15'000km they were pretty decent. The M176, M177, M256, M276 today are thankfully pretty damn robust from Mercedes

OM616 checking in here.

With most cars, they are scrapped at around 12 years old with perhaps 120,000 miles on them. The engine, gearbox and key parts tend to last the life of the car. What is the problem?

Just drive electric. Electric motors can last millions of miles, and these days even batteries. LFP batteries can last more than a million miles.

Honda 1.5 turbo 2019 FK7 86k kilometres with no issues at all. It is a reliable engine anybody can say anything. Change oil every 6-8000 km not 15000 KMs. L15B7 is a very good and reliable engine!

So whats the relationship between oil pressure and engine downsizing?

So I should just buy a big engine car? What’s the most reliable and efficient engine these days?

To be fair, BMW creates engines with plastic internals that destroys itself after 70k miles.

The car makers are trying to make ICE engines look bad by not making them as durable and reliable as they used to be so we all buy boring EV's that aren't actually saving the environment.

This is why i got a Lexus gx460. NA V8, port injected, oversized, and unstressed. Hope it'll last me a couple decades.

0:54 Ah yes, exactly how I want my car: ellijunt

ea888 engine?

Would changing oil viscosity help with oil pressure?

Low tension piston rings, lower oil pressure is why engines will give up the ghost sooner than necessary since they are essentially ‘high mileage’ from the get go. Putting low tension piston rings in is equivalent to putting ones in from a worn out junker engine.

I see on daily basis M276 engine with 220k km which runs perfectly, and OM642 one of the best diesel engine ever, also each day I see car with this engine, 280k km no issues And personally I own OM629, this one is unique, because it features replaceable sleeves

Sounds like ICE cars are struggling to make emissions regulations and are having to make questionable engineering choices to get there.

My 230E from 1984 also had bad timing chain at 33k miles. Dealer service just shrugged, another one under warranty.

My 2023 Subaru BRZ idles at 5 psi when engine is at operating temperature around 180 F. At the start, when the engine is cold it idles at 100 psi. It has such a large range depending on the oil temperature. This viscosity Subaru recommends is 0w20. What should I do to protect my engine? Should I got to higher viscosity oil. If I upgrade the oil pump per your recommendation I will have even higher pressure than 100 at the cold start?

Cost cutting, making everthing as light as possible for better emissions and long service intervals. A disasterous combination.

I wonder if this is true of 2012 5 liter Chevrolet V-8 Silverado engines.

As Americans like to say: "You wouldn't be having that problem with a V8.".

Politics destroys everything. Friendships as well...

Why produce and sell one car that lasts if you can produce and sell five instead. All that material produced for parts, energy wasted and emission produced by mining companies, factories and transport in the complete production cost is usually not considered when creating regulations. It is all just bullshit and excuse to make more money by just wasting more of everything. All these cars by the end of thier life, with clogged DPF's, damaged pistons, turbines are producing more shit to the local atmosphere than good old engine in car that is still running.

What about all the old 350 chevy v8’s idling along at like 5 psi for 30 years before it needs rebuilt

This.

What about w204 c200 CGI/ c220 cdi?

Can you also name the Benz cars in which these engines were installed so that a lay man can avoid buying those models?

Planned obsolescence... it's been a downward spiral since the 90's for all manufactures of all things sadly. Yay "green movement"

20psi at idle a lot of pressure, engines that are designed to can run sub 1bar at idle at 100C also my Honda K24 engine has 0.3bar oil supply to the head before VTEC is engaged and they last nearly 1mil kms so it depends on the engine and the design/architecture.