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  1. #1

    Join Date
    Nov 2005
    Location
    Minnesota
    Posts
    100

    Obtaining 93 octane

    Here in Minnesota, it is difficult to find 93 Octane. I know that the turbo's require 93 Octane.. Is there any way to take 91 or 92 Octane and add an octane boost or a little racing fuel ( like 106 octane ) to obtain 93?
    Just curious if there are individuals doing this already.


  2. #2
    captain obvious Lurker's Avatar
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    Jul 2005
    Location
    Visalia, Ca
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    here is some info I saved years ago

    Formula #1 - Toluene
    R+M/2.........114
    Cost...........$2.50/gal
    Mixtures with 92 Octane Premium
    10%...........94.2 Octane
    20%...........96.4 Octane
    30%...........98.6 Octane
    Notes: Common ingredient in Octane Boosters in a can. 12-16 ounces will only raise octane 2-3 *points*, i.e. from 92 to 92.3. Often costs $3-5 for 12-16 ounces, when it can be purchased for less than $3/gal at chemical supply houses or paint stores.

    Formula #2 - Xylene
    R+M/2.........117
    Cost...........$2.75/gal
    Mixtures with 92 Octane Premium
    10%...........94.5 Octane
    20%...........97.0 Octane
    30%...........99.5 Octane
    Notes: Similar to Toluene. 12-16 ounces will only raise octane 2-3 *points*, i.e. from 92 to 92.3. Usually mixed with Toluene and advertised as *race formula*.

    Formula #3 - Methyl-tertiary-butyl-ether (MTBE)
    R+M/2.........118
    Cost...........$3.50/gal
    Mixtures with 92 Octane Premium
    10%...........94.6 Octane
    20%...........97.2 Octane
    30%...........99.8 Octane
    Notes: Oxygenate. Very common in octane booster products. Has lower BTU content than toluene or xylene, but oxygenate effect makes the gasoline burn better and produce more energy.

    Formula #4 - Methanol or Ethanol
    R+M/2.........101
    Cost...........$0.60 - $1.75/gal
    Mixtures with 92 Octane Premium
    10%...........94.3 Octane (Methanol)
    10%...........94.7 Octane (Ethanol)
    20%...........Not Recommended
    Notes: Methanol is wood alcohol. Ethanol is grain alcohol and found in Gasohol in 10% ratios. Both alcohols are mildly corrosive and will eat gas tank linings, rubber and aluminum if used in excessive ratios. Main ingredient in "Gas Dryers", combine with water.

    Formula #5 - Isopropyl Alcohol and Tertiary Butyl Alcohol
    R+M/2.........101
    Cost...........$0.60-$1.50/gal
    Mixtures with 92 Octane Premium
    10%...........94.5 Octane
    20%...........Not Recommended
    30%...........Not Recommended

    Notes: Similar to Methanol/Ethanol. Isopropyl Alcohol is simply rubbing alcohol.

    Sample Mixture
    To make your own octane booster, it is easiest to make up a large batch, and then bottle it up in "dosage-size" uses.
    Below is the basic formula of one of the popular octane booster products. To make eight 16 ounce bottles (128 oz = 1 gal):

    100 oz of toluene for octane boost
    25 oz of mineral spirits (cleaning agent)
    3 oz of transmission fluid (lubricating agent)
    This product is advertised as "octane booster with cleaning agent *and* lubricating agent!". Diesel fuel or kerosene can be substituted for mineral spirits and light turbine oil can be substituted for transmission fluid. Color can be added with petroleum dyes.
    Last edited by Lurker; 05-12-2008 at 12:51 PM.

  3. #3
    Faster Than a Snail on a Log mongorunner's Avatar
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    Quote Originally Posted by _Lurker_ View Post
    here is some info I saved years ago
    this is what i came in here to post!

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