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Old 12-11-2009, 12:46 AM
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GPSHSLAX GPSHSLAX is offline
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The octane number you see on the gas pump is an indicator is preignition resistant. That's it. Is has nothing to do with fuel economy. In fact higher octane fuel has more addatives to affect that property and theoretically results in lower enegry desity and fuel economy. In practice the difference is unnoticably small and there is no change in MPG based on gas octane.
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Mods: Thule Xsporter 422XT bed rack, Underrail Rhinolining, MOPAR class IV Hitch, DIY CAI, Aero Turbine 3030.
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