The Volkswagen Jetta engine is expected to last between 200,000 and 250,000 miles on average providing it is properly maintained. The 2022 Jetta uses a 158-hp 1.5-liter turbocharged four-cylinder. Previously it used a 147-hp 1.4-liter turbocharged four-cylinder. This is because they tend to have a longer life than gas-powered vehicles. CarsDirect adds to the discussion by pointing out that “a gasoline-powered truck can run for 200,000 miles. Conversely, a diesel truck has a longer lifespan and can run for at least 500,000 and as much as 800,000 miles. This is because it has a heavier and sturdier
The good news is that modern diesel engines – those meeting Euro 6 emissions regulations, and forthcoming, even tougher EU7 limits due mid-decade – are impressively clean, with sufficient
The only engine-related problems with the V10 have to do with spark plugs. Aluminum heads on engines manufactured before 2008 suffered from stripped, missing and generally defective spark plug threads. Considering that this problem happened on engines that are now at least 14 years old, the issue was likely resolved in the meantime.
Diesel mix grew from 43% to 54% when fuel price difference soared to 37% in 2012. Once price difference began to cool down, diesel mix too came down linearly, though at a different rate. When fuel price different started falling again since 2016, diesel mix too reduced over time.
The other thing that effects how quickly an engine wears out is how much "slop" there is between the moving parts. This determines how long it takes the engine to rattle itself into oblivion. Today's engines are built to much stricter tolerances, and have much less "slop" than engines built in 1978. Two other factors favor today's engines.
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