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Thread: fuel octane question

  1. 11-07-2005, 12:20 AM #1
    kev535i
    kev535i is offline Big Time Poster
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    Default fuel octane question

    having just taken delivery of my EAT chip-very impressed so far- im confused about the different octane rating systems, here in Aust we have 92 ron = unleaded 95 ron = premium unleaded and 98ron = super premium unleaded but i notice these numbers are different in US what are your comparison numbers or is their some easy formula to translate

    kev535i south oz
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  2. 11-07-2005, 12:42 AM #2
    Torque
    Torque is offline Major Contributor
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    Default

    There is a formula, but I honesly don't know it off the top of my head.

    Approximate values off the top of my head:
    AUS --- USA
    92 -------85-87
    95--------87-89
    98--------91-93
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  3. 11-07-2005, 12:51 AM #3
    uscharalph
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    Default

    Quote Originally Posted by kev535i
    having just taken delivery of my EAT chip-very impressed so far- im confused about the different octane rating systems, here in Aust we have 92 ron = unleaded 95 ron = premium unleaded and 98ron = super premium unleaded but i notice these numbers are different in US what are your comparison numbers or is their some easy formula to translate
    Basically, just use the highest octane fuel.

    Ralph Mendoza Jr. - Long Beach, CA
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  4. 11-07-2005, 12:52 AM #4
    uscharalph
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    Quote Originally Posted by kev535i
    having just taken delivery of my EAT chip-very impressed so far- im confused about the different octane rating systems, here in Aust we have 92 ron = unleaded 95 ron = premium unleaded and 98ron = super premium unleaded but i notice these numbers are different in US what are your comparison numbers or is their some easy formula to translate
    Very clean '88 Kev!!

    Ralph Mendoza Jr. - Long Beach, CA
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  5. 11-07-2005, 07:51 AM #5
    Bill R.
    Bill R. is offline Super Moderator
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    Default The US numbers are in AKI or anti knock index and

    Aus. uses Ron numbers..
    87 AKI = 92 ron
    91 AKI = 95 ron
    94 AKI = 98 ron






    Quote Originally Posted by kev535i
    having just taken delivery of my EAT chip-very impressed so far- im confused about the different octane rating systems, here in Aust we have 92 ron = unleaded 95 ron = premium unleaded and 98ron = super premium unleaded but i notice these numbers are different in US what are your comparison numbers or is their some easy formula to translate
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