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Thread: 91 Octane?

  1. #1 Question 91 Octane? 
    Join Date
    May 2007
    Location
    St-Q, N.B.
    Posts
    110
    Hi guys.
    I just bought a new motor.
    the CY27RS and runs on 91 octane.
    they say to use the R+M/2 octane rating methode.
    what is that formula?
    do you raise your octane using those little octane bottle or the octane oil?
    thanks for your rplies.

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  2. #2 Default  
    Join Date
    Feb 2007
    Location
    Campbell River, BC
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    3,291
    Real Name
    Clayton
    Different countries have different ratings scales for the same fuel.

    http://en.wikipedia.org/wiki/Octane_rating

    I would ignore anything other than what it says to use for Octane.

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  3. #3 Default  
    Join Date
    May 2007
    Location
    St-Q, N.B.
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    110
    they say 91 or better fuel.
    do they mean higher octane?
    how high of octane can one go?

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  4. #4 Default  
    Join Date
    Feb 2007
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    Campbell River, BC
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    Clayton
    I would use 91 if that is what they say, for a couple of reasons.
    1 is the fact it is designed to run on 91
    2 Higher octane is more money and unless you are racing it wont matter much to you
    3 Higher octane is more money
    4 Higher octane is more money

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  5. #5 Default  
    Join Date
    May 2007
    Location
    St-Q, N.B.
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    Thanks I`ll follow your advice and save money!!!
    It`s just that i`m not sure if the supreme gas we got here is 91 or 89 octane

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  6. #6 Default  
    Join Date
    Feb 2007
    Location
    Campbell River, BC
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    Real Name
    Clayton
    In Canada!!!

    Grade
    Octane Level

    Petro-Canada Brand Name

    Regular
    87 octane


    RegularClean
    Mid-grade
    89 octane


    PlusClean
    Premium
    91 octane


    SuperClean*
    Super premium
    94 octane


    SuperClean 94, available in Montréal, Vancouver and Victoria

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  7. #7 Default  
    Join Date
    Feb 2007
    Location
    Campbell River, BC
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    Clayton

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  8. #8 Default  
    Sorry, I've to Hijack this thread. Just for my interest, your regular fuel have 87 octane???
    OMG how do your cars(real) run?

    Here in Europe:

    Regular 91 Octane

    Super 95 Octane

    Super Plus 98 - 100 Octane (Shell offers 100 all others 98)

    In my Zenoah I use a 1:33 mixture Castrol RS 2T and Super Plus with 98 Octane.

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  9. #9 Default  
    Join Date
    Feb 2007
    Location
    Campbell River, BC
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    Clayton
    Different countries have different formulas for coming up with numbers
    Europe's 91 I believe is the same as Canada's 89

    I think my first link up top explains it a bit.

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  10. #10 Default  
    Join Date
    Feb 2007
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    1,195
    I would not worry so much on the octane... many people use camp fuel which is way under these number with no problem at all. I've gone back to regular fuel here in canada. But I'm one of those crazy people that has a head kit motor and want to put the 20:1 head button in and run methonal... just to see if it makes more power! But I ran high grade fuel with the head kit motor, and now am running regular with the 28.5 reed ported motor. The only thing I found was that im not running the right heat range plug, have to go to a hotter plug.

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