nimbius says>" ... japanese invention called the self clearancing piston." Never heard of it! What you're describing is commonly known as "break-in" and has be

nimbius says>" ... japanese invention called the self clearancing piston." Never heard of it! What you're describing is commonly known as "break-in" and has been part of auto care from day two until now: https://en.wikipedia.org/wiki/Break-in_%28mechanical_run-in%29 https://en.wikipedia.org/wiki/Break-in_%28mechanical_run-in%... I agree that Japanese auto manufacturers use excellent steel and were quicker to put, say, higher-nickel steel into parts. nimbius says> " Its not uncommon to see working sets of motors in japanese cars that are 30 years old where window motors and such would easily have failed in american sedans." Too far: it's uncommon to see a 30-year old Japanese car (built in 1988 or before) that runs at all, much less that has working power windows!