Quote:
Originally Posted by FvnnyL3tt3r1ng
I only put 87 octane in my tank once and the engine knocked under decel. I read in the owners manual 91 minimum so I've always used 93....
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An engine will detonate under load - not decel.
87 octane is all you need. Any more octane than required gives you less power and mileage.
Go up in octane only if you need to get away from Ethanol. 87 w/o Ethanol will be the best if you can get it.