Pontiac Solstice Forum - View Single Post - Oops! Accidentally put 87 octane in my GXP.

Quote:

I'm sure one tankful won't cause any permanent damage, just a possible small drop in performance until you run enough premium through it.

You'll have more than just a small drop in performance. Knock sensors tend to be on the Nazi side to protect the engine.

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2007 Cool GXP with Darkside Top, 5 spd, Ebony Cloth, Monsoon with Single CD, Sport Pedals, XM, A/C
Mods - Solo Street/Race Exhaust, K&N Drop-in Air Filter, EDAL, Dunlop Direzza Sport Z1 Star Spec Tires (stock size)

	mena661 Member Join Date: Nov 2005 Location: Rosamond, CA - Home of Willow Springs Raceway	Quote: I'm sure one tankful won't cause any permanent damage, just a possible small drop in performance until you run enough premium through it. You'll have more than just a small drop in performance. Knock sensors tend to be on the Nazi side to protect the engine. __________________ 2007 Cool GXP with Darkside Top, 5 spd, Ebony Cloth, Monsoon with Single CD, Sport Pedals, XM, A/C Mods - Solo Street/Race Exhaust, K&N Drop-in Air Filter, EDAL, Dunlop Direzza Sport Z1 Star Spec Tires (stock size)