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Thread: What grade of gas should I put in my bike?

  1. #11
    I use only Supreme from a station that doesn't mix it with ethanol

  2. #12
    Senior Member
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    Your just wasting money if u use higher that the manual says. I have run 87 89 and 93 in my xb haven't really ever noticed much difference. I usually run mid grade in the bike. People get the false impression that its more expensive so its better and will give u more power. That's not true

  3. #13
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    More power? No. Better response? yes. Safer for our engines? Yes. Theres many reasons why we are suppose to use higher octane gases.

  4. #14
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    i dont see why you would cheap out on gas. i mean the tanks so small it dosent cost much to fill.

  5. #15
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    Havent tried it on my Buell but my car costs more to use regular. If I use premium 92-93 I get way better gas mileage and in the length of the tank it actually saves me money to run premium. The mileage is really bad with regular 87. I only run premium in my Buell. Not sure if it would do the same thing with the Buell as it did in my car. Just another thing to consider.

  6. #16
    What does the manual say... hmmmmm.

  7. #17
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    I'm not a chemist by any means, but I am pretty sure ethanol and methanol are different. Based on the screenshot above, the manual says not to use gasoline mixed with methanol. The original post was asking about gasoline mixed with ethanol.

    The portion of the screenshot above that is cut off:

    ETHANOL: is a mixture of 10% ethanol (Grain alcohol) and 90% gasoline. Gasoline/ethanol blends can be used in your motorcycle if the ethanol content does not exceed 10%.

    Just an FYI - this is from my 2005 Buell XB9R's manual. I would assume it's the same for all Buell's, but cannot be certain.

    Hope that helps also!
    -Matt

  8. #18
    Senior Member
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    I run 91 octane straight petrol in my '08 XB12S

  9. #19
    Matt, you maybe correct. I understood the question to be 87 or 89 or 91 or 93 etc. etc. Not ethanol or no ethanol.

    Correct, the manual does say up to 10% ethanol is ok... I prefer 100% gas 91 or higher.

  10. #20
    Senior Member
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    Aug 2011
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    Matt, you maybe correct. I understood the question to be 87 or 89 or 91 or 93 etc. etc. Not ethanol or no ethanol.

    Correct, the manual does say up to 10% ethanol is ok... I prefer 100% gas 91 or higher.
    Yeah, but he specifically asked should he not use premium because it contained ethanol. Around here, every grade contains 10% ethanol, or maybe that was back in FL (I just moved to OH)? I'll check the next time I fill up, but I'm fairly sure in both OH and FL all grades contain 10% ethanol (Not just premium). My car requires premium, so I've always used premium in everything.

    -Matt



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