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Thread: Octane

  1. ☑ ORIGINAL POSTER #1
    Junior Member Big K's Avatar
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    Exclamation Octane

    Hello fellow seadooers. So I was thinking about the octane I should run in my 05 sea-doo. It states that we are supposed to run 87 octane. Will it hurt to run 89 with the 10% ethanol? The reason I am asking is I reserved 400 gallons of fuel through my work so I could get gas for 3.50 a gallon for 6 months. Which is more then enough. The catch is I cannot get 87% octane and I don't want to put the 89% in the ski if it is going to hurt it. My ski is a 2 stroke GTI 2005.

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  3. #2
    kustomkarl's Avatar
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    That octane isn't going to hurt it. Even 102 octane wouldn't "hurt" it. It is justed wasted octane as the engine only needs 87 to run properly.

    Karl
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  4. #3
    Experienced Rider All Things Custom's Avatar
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    always go higher never go lower.....

    more octane wont hurt but lower will cause detonation.

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  5. ☑ ORIGINAL POSTER #4
    Junior Member Big K's Avatar
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    Default Ethanol

    So the ethanol in the gas wouldn't hurt the ski. Since it is only a year old I don't want to screw anything up!

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  6. #5
    ScubaDoo's Avatar
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    Never use fuel containing more than 10 % alcohol,( Methanol or Ethanol) as severe damage will occur. The minimum of 87 octane is recommended for most engines.
    Welcome to the most informative and Friendly Seadoo Forum on the internet!

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