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What Octane?

1688 Views 23 Replies 12 Participants Last post by  ZeroCooll21
What octane should I be putting in my evo? Im new to the Evo world and I am picking up my car in 3 days and 6 hours (not excited or anything) and I stopped at the gas station to fill up, i just assumed i should be putting the best in I can, Looks like at the Tesoro stations up here 90 is thier top.

Its a 2011 Gsr by the way, The seller put Perrin Performance exhaust and a K&N intake on it and got it tuned if that makes a difference
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Shell 93
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