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My bro has a RSX-S k proed and was tuned with 94 first. When Petro Can stopped selling 94, he got a few tanks of 91 and retuned. He only lost 1 whp and a little torque, so I would say keep it at 91. I drove my turbo ls to Calgary, and almost ran out of gas on the way back because half the gas stations off the highway only sold regular... plus the car ran like shit because i was forced to fill up with 91 while in Calgary.
Last edited by up&atam; 12-06-2010 at 05:57 PM.
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