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mtndoctor · 04-22-2008, 03:25 PM

too hot? its usually the other way around, the cats have low comp. so you can run 87 octane which burns hotter and will make more power, then running 91 in a low comp motor, only run 91 if your 12.5-1 and higher comp.

04-22-2008, 03:25 PM	#6 (permalink)
mtndoctor Member Join Date: Mar 2008 Location: golden Posts: 34 Casino Cash: $73400 Thanks: 0 Thanked 14 Times in 11 Posts No Classified Ratings	Re: 06 M7 fuel too hot? its usually the other way around, the cats have low comp. so you can run 87 octane which burns hotter and will make more power, then running 91 in a low comp motor, only run 91 if your 12.5-1 and higher comp.