When is the mileage too high for performance upgrades. Some mechanics say that anything over 100 to 150 thousand is too much. Ive also heard that it doesnt matter about the mileage its more about the shape the engine and drivetrain is in. Offcourse we do drive hondas that are usually capable of very high mileage without any loss of integrity so any thoughts on high mileage performance mods. thanks in advance