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Thread: What is the true Octane #

  1. #1
    Senior Member MASTER BUILDER
    Join Date
    Mar 2009

    What is the true Octane #

    What is the true Octane # for Sunoco fuels I guess and everybody elses to. Pump octane #
    Reserch octane #
    Motor Octane #
    They are all Different. I didn't put any #'s up they are all different.
    Thanks Andy

  2. #2
    Senior Member DYNO OPERATOR
    Join Date
    Apr 2008
    Sunoco fuels publish the motor octane rating of each grade they sell in addition to the higher research octane rating's. If you use the motor octane rating to compare detonation resistance from fuel to fuel you will be comparing oranges to oranges if you will. Sunoco standard's motor is 105, supreme's motor is 110 and maximal motor rating is 114. Motor rating is the most important in racing engines running at WOT.

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