In Reply to: hey, how much is that gas/gallon??? thanks posted by SLVRBLT on May 15, 1999 at 13:44:51:
I don't mean to be insulting, perhaps everyone on this thread already knows this, but...unless you're running very high boost (like the guy who can dial it up to 18 psi) or higher than stock compression, extra octane numbers are a waste of money. The higher number refers to resistance to detonation, so unless you're knocking on premium with your current setup, you won't gain "power" at all with a higher octane. The usual supercharged M3's would not benefit from much beyond 93 octane.