Quote:
Originally Posted by headpunter
the one thing is i was told that you arent supposed to run anything more them base unleaded in them because using higher octane causes more "heat" in the chamber and can damage the injectors. idk maybe caddy salesmen was talking out his ass, but i did see a sticker that said 87-octane only.
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Totally talking out of his ass. Higher than recommended octane won't increase performance or efficiency in most vehicles, but it won't break anything.