The exception not the rule. a 300 Ford would run for 100,00 with a knock. That does not mean every american engine ever built in the 50's and 60's would run for 200,000 like the newer motors do. Anybody that has spent any time working on cars will know that. Into the early 80's american car engines were worn out around 90 to 100 K. Simple fact. Lot's have changed since then. Back in the 70's and 80's they were rotted to the door handle's in 5 years. You don't see them rotted like that anymore.