Do diesel engines last longer than gas engines?


Diesel engines usually are built to be much stronger than gasoline engines in a given application and diesel engines wear much less under a high engine load than gasoline engines.

However, modern engines from companies that don’t have their head up their butt don’t break. they just don’t. It’s not uncommon for small block chevy v8s to go 400,000+ miles.
Toyota’s inline-4 gas engines that have timing chains just don’t break.

Conversely, GM’s 1980s diesel engines for passenger cars often didn’t make it to 100,000 miles. And the VW twincharged 1.4 fails at an astonishingly high rate.

You know what’s the largest determinant of an engine’s life?
The plant that made it.
You know what separates the engines that go 240,000 miles from the engines that go 1,000,000 (assuming maintainance is done)?
How the manufacturing defects and deviations add up (the variance) in the engine as a whole. Some engines are just better balanced than others and there’s nothing you can do to avoid that. Sure, you can buy a Lexus V8 which goes through CT scanners with physics grade antennas and mil spec DSP that looks for unusual readings from the engines, and that’s the best assurance you’ll ever get that your engine is going to last a long time.
Add Comment • Jun 20, 2011

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Why do diesel engines last longer than gasoline engines?

Tyler Carey, motorcycle engine tuner, proud owner …
motorcycle engine tuner, proud owner of a car. Cars & Automobiles
Diesel engines usually are built to be much stronger than gasoline engines in a given application and diesel engines wear much less under a high engine load than gasoline engines.

However, modern engines from companies that don’t have their head up their butt don’t break. they just don’t. It’s not uncommon for small block chevy v8s to go 400,000+ miles.
Toyota’s inline-4 gas engines that have timing chains just don’t break.

Conversely, GM’s 1980s diesel engines for passenger cars often didn’t make it to 100,000 miles. And the VW twincharged 1.4 fails at an astonishingly high rate.

You know what’s the largest determinant of an engine’s life?
The plant that made it.
You know what separates the engines that go 240,000 miles from the engines that go 1,000,000 (assuming maintainance is done)?
How the manufacturing defects and deviations add up (the variance) in the engine as a whole. Some engines are just better balanced than others and there’s nothing you can do to avoid that. Sure, you can buy a Lexus V8 which goes through CT scanners with physics grade antennas and mil spec DSP that looks for unusual readings from the engines, and that’s the best assurance you’ll ever get that your engine is going to last a long time.
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