unless you change your compression ratio you won't realize any advantages to higher octanes. Remember octane is not a measurement of energy potential -- it measures a fuel's resistance to premature detonation. Higher octanes mean you can safely compress the gas further. But you can't take advantage of that just by filling up with higher octane
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2010 Platinum Graphite 370z Roadster:Touring/Sport
2013 Subaru BRZ Limited
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