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Old 08-16-2009, 08:49 PM   #2
[ion] C2
636 whp
 
Join Date: Aug 2006
Location: AZ
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No. Do you know what the octane rating means? It's a measurement of the fuel's resistance to burn. You increase the octane, it slows the burn down, and reduces its tendency to self-combust under pressure/heat. It's for high compression, turbocharged or supercharged engines.

If the car is not tuned for it (raising the spark advance), it will make zero benefits for you. The car is tuned from the factory to operate at its peak efficiency on 87 octane.
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