Thread: quick question
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Old Thu, February 25th, 2010, 11:13 AM
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Jackpine Jackpine is offline
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Originally Posted by Unleashedford View Post
THATS FREAKEN AWSOME!!! THANKS GUYS!!! and i had less then a 1/4 tank of 87 and i just filled it up with 91, is it okay if i run 93 even though it had a little 87 in it?
You probably can, but you may need to retard the spark some (I'd guess maybe 1.0 degrees) because you're probably burning a mix that's actually 90 octane. However, it probably won't matter much. If the knock sensors detect "ping", the spark will be automatically retarded - a lot, and that will prevent damage. But retarding the spark could actually give you better performance right now.

- Jack
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