it MIGHT wear your engine faster but you also run more of a chance of throwing a rod or something. But i still drive fast, and i have reached 70 before my car shifted into 3rd gear and i drive an automatic, might be because i have a big 3 SPEED whoooooo!!! so yes it might wear your engine a bit faster but i wouldent worry about it, cause you really wont be able to tell till you get way up there in miles
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