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I believe that's the highest octane you're allowed by law to pump into the car yourself. Since higher octane is used to ward off detonation, which I doubt you're getting in a n/a, there probably aren't any performance gains associated with the gas.
Brad (Pearl300Z) / (JSpecZ32) 1994 SuperBlack Slicktop Coupe 1991 PearlWhite 2+2 March 1991 - June 21, 1999

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