It means any quality engine used in a theoretical environment should last a very long time. Some engines in the real world really do last a very long time.. Some examples: AMC 258/4.0, Ford 300, SBC, Dodge 318, Cummins 6BT.
Ha, ha . . . fair enough.

Depending on a couple variables, absolutely.
Thanks Mace. This is interesting. I've usually assumed that an engine with lower compression was on a slippery slope to failure. This might also explain this JohnnyC quote:
. . . my cruiser had over 200,000 when i bought it was very excessive blowby...disconected the hose ands routed it to vent to the bottom of the truck...told myself i'll wait till it blows before i change the engine...never happened...18 years later and 400,000+ miles on the engine i replaced it because of the excessive oil leaks and roadkill was moving faster on the road than me![]()