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cummins ism poor fuel milage

Discussion in 'Trucks [ Eighteen Wheelers ]' started by truckerbangin, Dec 12, 2018.

  1. Dec 12, 2018 #1
    truckerbangin

    truckerbangin Light Load Member

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    i have a international 8600 with a cummins ism with egr. trucks burns about 128 gallons a week compare to my Detroit 12.7L 14L and other m11 that burn between 70-90 gallons a week. any idea on what causes poor fuel mileage with these motors? truck has a variable vane turbo on it which appears to function properly.
     
    truckerbangin, Dec 12, 2018
    truckerbangin, Dec 12, 2018
    #1
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  3. Dec 12, 2018 #2
    Brettj3876

    Brettj3876 Road Train Member

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    What rears does it have
     
    Brettj3876, Dec 12, 2018
    Brettj3876, Dec 12, 2018
    #2
  4. Dec 12, 2018 #3
    AModelCat

    AModelCat Road Train Member

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    Not really enough info to determine anything. Drivetrain specs? Same drivers? Same routes? Same loads?
     
    AModelCat, Dec 12, 2018
    AModelCat, Dec 12, 2018
    #3
    Brettj3876 Thanks this.
  5. Dec 12, 2018 #4
    Brettj3876

    Brettj3876 Road Train Member

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    Yea that's quite a bit more fuel. If they're the same loads I'm betting the rears are super low or egr issues. Even if the driver has a lead foot that's a ton more fuel.

    What weight, hp, trans and rears?
     
    Brettj3876, Dec 12, 2018
    Brettj3876, Dec 12, 2018
    #4
  7. Dec 12, 2018 #5
    truckerbangin

    truckerbangin Light Load Member

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    will verify all the specs in the morning.
     
    truckerbangin, Dec 12, 2018
    truckerbangin, Dec 12, 2018
    #5
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