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yeah that is what i was thinking,seems to me it would not add much.
i run 89 now.I be better off to save the money and go to 91 octane.
Why is your car tuned for 91 octane? Is the timing advanced? Or do you just have money that you don't want anymore so might as well throw it in your gas tank and get some poor performance and poor mileage out of it? Stop reading Honda magazines. Octane doesn't add power it resists detonation.
Holy f*ucking ****! Is that a cobra emblem in the front of your GT?