Well back in the 50's, 60's and 70's 100k miles used to be about all you would get out of an engine, some wouldn't even get that far. Carb's are tough, they wash the oil off the cylinder walls, and do all sorts of neat things.

Diesels didn't have this problem, they would last two or three times as long.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200