[bischofs]

the 24 hours of Le Mans, and tens of thousands of runabout marine applications with automotive engines disagree with you. The real question is would you prefer a 1950s Lycoming engine with a mechanical fueling system, or a modern car engine that has been proven in millions of vehicles?

[ceejayoz]

https://en.wikipedia.org/wiki/24_Hours_of_Le_Mans says "Racing teams must balance the demands of speed with the cars' ability to run for 24 hours without mechanical failure", which implies a slightly shorter lifespan than you'd want in a plane.

[aredox]

As if running an engine for 24 hours was good enough for a plane!

And le Mans is not an oval track: engines don't run at 100% all the time.

And how many le Mans cars break down during the race?