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Thread: octane boost

  1. #1
    k-town don
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    octane boost

    This summer we have a trip planed on lake norris in Tenn. the guy at the marina says he only has 90 oct.. What additve do you guys recomend to get me upto 93 octane. My 07 runs like crap on anything less than 93. I have never had any trouble finding it untill now. Thanks for any input.


  2. #2
    Hydrotoys's Avatar
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    Welcome to the GH forums.

    Consider bringing your own fuel in 5/6 gallon jugs. It will be cheaper, and you will know the source.

  3. #3
    Lake Mead Bum & BTLS Mark starflight's Avatar
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    Check out the link xlint posted here about using toluene as a booster.

  4. #4
    BR549's Avatar
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    I just buy 2gal VP race fuel and add 8oz per tank.

  5. #5
    Hooah_Killer's Avatar
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    I do use toluene OR xylene. Here is the basic FORMULA to calculate for a 250x.

    The basic formula is quiet easy actually. The tank of the 250x =20.6 gal. Filling it with 19.6 gallons of 91 octane and 1 gallon of toluene (114 octane) will yield a fuel mix of:

    (19.6 * 91) + (1 * 114) / 20.6 = 92.1 To get exactly 93 octane you would need to add 1.2 gal of toluene per tank of gas.

    So if you wanted 96 octane you would do the simple math: (solve for x)

    (19.6*91) +(x*114)/20.6=96
    1783.6 + 114x/20.6=96
    1783.6+114x=1978
    114x=1978-1783.6
    184/114=x
    x=1.61gal toluene

    NOW, having or carrying a gal of toluene/xylene with you is a pain in the ars......

    There have been tests conducted that have shown that Lucas, NOS and Outlaw octane boosters of 1 can/tank can raise 91 octane to 93????? Maybe in the dilute quantities of the test parameters (they used one can of booster to 1 gal of 91 octane..DUH). Most octane boosters are within the 101-104 octane rating. SO if you use the above formula:

    (20.475*91) + (.125(gal)*104)/20.6= 91.07!!!!! When these companies state their product raises octane by 1-3 points a point = .1 NOT 1, SOOOOO these octane booster WILL Not bump your 91 or 93 octane to 93 or 96 octane. 16oz - .125 gallons btw.

    The only effetive way to bump your 91 or 93 octane gas is by using toluene/xylene or race gas.......and this is not cheap...but if you wanna play you have to pay!!!

    YES I have a graduate degrees in chemistry and toxicology...........


    Some links:
    http://www.answers.com/topic/octane-rating-1
    http://www.europeancarweb.com/tech/0...ted/index.html (read the fine print of test parameter)

  6. #6
    k-town don
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    octane boost

    Thanks guys with all the help I think I can make this work. I know that with just plain pump gas it just dosen't get the job done.

  7. #7
    Buy yourself a handheld octane meter, then you can see what you have,
    add your toluene in small measured oz till you get what you whant!!!!!!!!

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Hooah_Killer View Post
    I do use toluene OR xylene. Here is the basic FORMULA to calculate for a 250x.

    The basic formula is quiet easy actually. The tank of the 250x =20.6 gal. Filling it with 19.6 gallons of 91 octane and 1 gallon of toluene (114 octane) will yield a fuel mix of:

    (19.6 * 91) + (1 * 114) / 20.6 = 92.1
    To get exactly 93 octane you would need to add 1.2 gal of toluene per tank of gas...
    How does 1 gallon of toluene produce a result of 92.1 octane, and only 1.2 gallons of toluene produce 93 octane?

    As you add toluene, you also reduce the amount of gasoline the tank can hold, so 19.6 gallons of gasoline in the tank is not a constant.

  9. #9
    Clear the air space! MKaman's Avatar
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    Quote Originally Posted by K447 View Post
    How does 1 gallon of toluene produce a result of 92.1 octane, and only 1.2 gallons of toluene produce 93 octane?

    As you add toluene, you also reduce the amount of gasoline the tank can hold, so 19.6 gallons of gasoline in the tank is not a constant.
    The tank is 20.6 gals, which would allow for a gallon plus of toluene

    Here's my question, 19.6 gallons of 93 octane plus a gallon of toluene/ xylene would yield what octane as I don't hold a degree in those fields

  10. #10
    Take the time to smile sirbreaksalot's Avatar
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    Quote Originally Posted by MKaman View Post
    The tank is 20.6 gals, which would allow for a gallon plus of toluene

    Here's my question, 19.6 gallons of 93 octane plus a gallon of toluene/ xylene would yield what octane as I don't hold a degree in those fields
    its about all she can take mister spok before she blows
    -67.99 x (y) carry the 6 = ???
    stuffed if I know

    I would just bring my own good fuel and not need to worry about making cordial

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