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octane levels

Discussion in 'X-Runners' started by bram, Apr 1, 2009.

  1. Apr 1, 2009 at 9:22 AM
    #1
    bram

    bram [OP] Well-Known Member

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    Bram
    belgium
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    hey i live in belgium and have imported an x.
    out here we run on 95 or 98 octane fuel .
    what are the numbers in the us?:confused:
    (i'm thinking about changing compression ratio):proposetoast:
     
  2. Apr 1, 2009 at 9:28 AM
    #2
    TengoTaco

    TengoTaco Wish i was wheelin

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    We have 87, 89, and 91.
     
  3. Apr 1, 2009 at 10:03 AM
    #3
    Toyota Truck

    Toyota Truck Well-Known Member

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    Belgium...cool any chance you could post any pics of your x-runner
     
  4. Apr 1, 2009 at 10:11 AM
    #4
    hillbillynwv

    hillbillynwv Well-Known Member

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    98.....wish we could get that here in the U.S.A......is that jet fuel?
     
  5. Apr 1, 2009 at 11:59 AM
    #5
    Janster

    Janster Old & Forgetful

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    And sometimes 93
     
  6. Apr 1, 2009 at 3:22 PM
    #6
    TEX357

    TEX357 TX

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    87 89 91 :d
     
  7. Apr 1, 2009 at 9:36 PM
    #7
    05 X-Runner

    05 X-Runner Murdered X

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    Same up here in Nor-Cal
     
  8. Apr 1, 2009 at 10:00 PM
    #8
    gdawg25

    gdawg25 Zoom-Zoom

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    Here's a little info on octane rating systems:

    Measurement methods
    The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane.

    There is another type of octane rating, called Motor Octane Number (MON) or the aviation lean octane rating, which is a better measure of how the fuel behaves when under load. MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, a higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern gasoline will be about 8 to 10 points lower than the RON. Normally fuel specifications require both a minimum RON and a minimum MON.
    In most countries (including all of Europe and Australia) the "headline" octane rating, shown on the pump, is the RON, but in the United States, Canada and some other countries the headline number is the average of the RON and the MON, sometimes called the Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), or (R+M)/2. Because of the 8 to 10 point difference noted above, the octane rating shown in the United States is 4 to 5 points lower than the same fuel elsewhere: 87 octane fuel, the "regular" gasoline in the US and Canada, is 91–92 in Europe. However most European pumps deliver 95 (RON) as "unleaded", equivalent to 90–91 US (R+M)/2, and some even deliver 98 (RON), 100 (RON), or 102 (RON).[2]
     
  9. Apr 1, 2009 at 10:03 PM
    #9
    EquinsuOcha

    EquinsuOcha Bourbon

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    Yep, we've got 93 all over the place in Texas.
     
  10. Apr 30, 2009 at 7:31 AM
    #10
    AUDITECH

    AUDITECH Carolina Alliance: LAZY DIVISION

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    In charlotte there are a couple of places you can get 100 put the nozzel is to big to fit so you have to put it into a can then your car
     
  11. Apr 30, 2009 at 7:44 AM
    #11
    Brunes

    Brunes abides. Thor

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    AVGAS (for piston aircraft engines) rates between ~100 and 130 octane. There are some density standards due to altitude...so the 100 octane rating is more or less equivalent to the octane rating on the gas pumps for cars.

    JET A/JET A-1/JET B/JP4/5/8- are jet fuels. They do not have an octane rating. Jet engines compress air without fuel, then introduce fuel into the compressed air and ignites it- No need for octane specifically, as there is no need for the fuel to withstand compressibility.

    All that nerdy mumbo jumbo being said- 100, 103, 108 never really impressed my bike...I'd be interested to see a dyno on it....
     
  12. Apr 30, 2009 at 8:18 AM
    #12
    Kenobe

    Kenobe Well-Known Member

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    Colorado: 85, 87 and 91.
     
  13. Apr 30, 2009 at 8:23 AM
    #13
    DanGer

    DanGer Avatar approved by 98tacomav6

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    In virginia we have 87, 89 and 93
     
  14. Jun 12, 2009 at 6:31 AM
    #14
    bram

    bram [OP] Well-Known Member

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    bedlid. custom made intake ... dt shorties and a flowtech warlock mufler lpi install and some music
    thanks, now i know howmuch the engine can take
     
  15. Jun 12, 2009 at 6:33 AM
    #15
    bram

    bram [OP] Well-Known Member

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    bedlid. custom made intake ... dt shorties and a flowtech warlock mufler lpi install and some music
    will try to post some pics (but its just a standard black x) ON THE OUTSIDE
     
  16. Jun 22, 2009 at 2:08 PM
    #16
    carmellocafe

    carmellocafe Begin With The End In Mind.

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    87;89;91 here... For some reason my truck gets best mileage running the 87.
     
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