Diesel - Zero Point? - Durability of Diesel Engines

Hello diesel experts,

In a forum (Focus Online), I found the following discussion about 'the durability of diesel engines':

Modern diesel engines, of course, don't last as long anymore. In diesel engines, there is what is called the 'diesel zero point.' This is at 2 liters of displacement and 100 horsepower. With this power output, every diesel engine and corresponding driving style will reach 1,000,000 km. For every 10 horsepower of additional power, the mileage decreases by 100,000 km. A 2-liter engine with 150 horsepower can now only achieve a maximum of 500,000 kilometers of mileage.

Similarly, the lifespan decreases by 50,000 km for every 100 ccm reduction in engine size. Therefore, a 1-liter engine with 100 horsepower would only be able to run for a maximum of 500,000 km. Based on this zero point, which is established in engine design, one can provide any number of calculation examples.

Manufacturers naturally choose a variant where the engine lasts for as long as possible within the warranty period, but after that, a significant percentage will still need to be replaced. Your own driving style naturally plays a significant role in determining the durability.

Does anyone know about this?
Does this 'zero point' really exist?

Regards,

Markus.

Hello!
My starting point was 5,000 km.

Greetings.

According to the invoice, you then had 194.5 horsepower .

The current zero point for our truck is at...
56 TKM - Crankshaft damage!!
Peugeot Boxer 2.5 Diesel - NO TURBO!

If a diesel engine in a passenger car typically lasts for 500,000 kilometers.
would, one could already be satisfied
Usually, they don't last that long.

Holger.

Diesel engines are typically designed for an average mileage of 500,000 kilometers.

When performance is increased, correspondingly better materials and different geometries must be chosen for the components. 'Refer to wider bearing surfaces for the crankshaft, connecting rods, and piston pins.'

I haven't heard anything about a 'diesel zero point' before.

I completely agree with Diesel-Dirk. The design specifications determine the average total lifespan that a motor can achieve. And not the literary output.

Best regards, caddy.

I just searched for "Dieselnullpunkt" on both Altavista and Google, and I got zero results in both cases. While it's not proof, it's at least an indication that there's not much to this "theory."

Because if that were the case, there's a high probability that someone has already published a paper on that topic online.

Or, to put it technically: Then, for example, the ASV would have to last 850,000 km - has anyone ever tested that?

Furthermore, the question arises as to how the calculations behind these figures are derived. The specification of 400,000 hours of MTBF (mean time between failure) for hard drives doesn't necessarily mean that you can expect such a device to last 45 years before failing. This specification means that if you run, for example, 400 hard drives from a specific BATCH for 1000 hours, then one of them will likely fail. And then it suddenly looks completely different.

Perhaps something similar is meant here...

Best regards,

Jan.

It's quite clear that a naturally aspirated 3-liter engine with 72 horsepower should last longer than a 1.9-liter engine with 150 horsepower that's turbocharged to 1.5 bar. Certainly, the new engines aren't thermally stressed too much due to sophisticated control maps and oversized cooling systems, but there are simply more components that can fail.
If a turbocharged engine isn't getting proper cooling, it will overheat. An old vacuum cleaner doesn't really care about that, for now.
In addition, the integration of electronics is a factor. Many of our vehicles have a second life in poorer countries. I work in bus manufacturing. Our buses are sent to Italy after 500,000 kilometers, and to the developing world after a million. If a mechanic (who are often very skilled!) uses an electric arc welder on the bus in those places, they can easily damage the electronics. This really causes problems, as it reduces the resale value at the end of a bus's lifespan.
There are real issues with the durability and reliability of turbocharged diesel engines. I'm not familiar with the concept of a 'diesel zero point.'