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  1. #1

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    Using 87 Octane?

    Was wondering how this works? All the marinas near me only have 87 octane. What I have been doing is either putting in gas from jugs straight or mixing jug 93 octane gas and only filling half up with 87 octane to get 90 or higher. I have not run straight 87 yet What would happen if I would.

    I do some moderate cruising so going on straight 90 or higher can be very difficult. I'm not going to strap a tank on the back either...


  2. #2
    Formerly Ultra250 TN Aquaholic6801's Avatar
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    I would only do it in an emergency, and IF you have to dont run it hard at all, detonation is a b*itch..............

  3. #3
    I'm in the same boat as you are. I live off of the Chesapeake bay and there are only a few marinas with 90+ octane fuel. Nonetheless, I never run 87 octane through my baby . I fill my ski up at the local gas station w/ 93 octane before launching it and then just plan my trips accordingly.

    There are some additives that you can add to your gas that supposedly bring up the octane rating. Also you could plan to fill up 100% at local station w/ 93 octane and then fill up at local marina w/ 89 when you reach 50% fuel or so. I would assume that mixing 50% 93 octane and 50% 89 octane "should" = 91 octane which should be good enough.

    By the way, what do you mean by "moderate cruising"? The longest trip I ever made was from south of Annapolis to Baltimore Inner Harbor (around 60mi round trip). I made it on one tank (barely). Honestly, I can't imagine wanting to rider farther. Ouch.

  4. #4
    I've run 87 octane fuel in my Yamaha VX110 Deluxe for 5 years with no problems at all. But my Kawasaki threw a rod this summer so maybe the Kawasaki's need a higher octane.

  5. #5
    Formerly Ultra250 TN Aquaholic6801's Avatar
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    Quote Originally Posted by brokestx12f View Post
    I've run 87 octane fuel in my Yamaha VX110 Deluxe for 5 years with no problems at all. But my Kawasaki threw a rod this summer so maybe the Kawasaki's need a higher octane.
    Hes talking about a 250....it requires 90 octane..........

  6. #6

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    Quote Originally Posted by Ultra250 Tn View Post
    Hes talking about a 250....it requires 90 octane..........
    Ooops! Forgot to mention it's an 07' 250X.

    And the marinas only have 87, not even 89 or 90.
    I have been putting in 93 then mixing with the 87. Just wondering what happens if I happen to run straight 87?

    "Moderate" cruising--yeah 50 or 60 miles. Just got back from 40 or so mi. cruise a little while ago.

  7. #7
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    Quote Originally Posted by dmk View Post
    Ooops! Forgot to mention it's an 07' 250X.

    And the marinas only have 87, not even 89 or 90.
    I have been putting in 93 then mixing with the 87. Just wondering what happens if I happen to run straight 87?

    "Moderate" cruising--yeah 50 or 60 miles. Just got back from 40 or so mi. cruise a little while ago.
    Straight 87 then straight to the dealer for new engine. It will detonate sooner or later when the conditions allow it. How lucky do you feel??

  8. #8
    Pack some octane booster in the storage area and add it to regular gasoline.

  9. #9
    Formerly Ultra250 TN Aquaholic6801's Avatar
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    Quote Originally Posted by rotortiller View Post
    Pack some octane booster in the storage area and add it to regular gasoline.
    That stuff is mostly snake oil, the only stuff that I know of that is any good is some stuff called Tourko (sp) If Morris is reading this thread he can chime in , He has used it in his high compression ultra 150 with success...........

  10. #10
    Agreed-you need to select a good and proven product and read the octane "points" rating. Octane rated pump fuel is certainly best, but without that option what's a throttle banger to do? I've used the stuff and it works better than hanging some dumb assed gas cans off the back of the machine.

    rt

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