X-15 Cummins thread

Discussion in 'Peterbilt Forum' started by KB3MMX, Feb 26, 2018.

  1. Dave_in_AZ

    Dave_in_AZ Road Train Member

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    What kind of truck?

    That’s pretty strange, cause me trusty ISX just about throws me through the windshield.
     
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  3. Trucker61016

    Trucker61016 Road Train Member

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    I have a 2019 Peterbilt 579 with the X15 E and I got it from the company when it had 1100 miles on it. Now I'm at 66,100 miles and the motor hasn't missed a beat. Regularly getting 7.5 mpg to 8 mpg when on really flat roads. Even running the mountains of PA I still can get 7 mpg because of coasting and how good the Endurant 12 speed is at low rpm .
     
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  4. Dave_in_AZ

    Dave_in_AZ Road Train Member

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    What horsepower rating?
     
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  5. Trucker61016

    Trucker61016 Road Train Member

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    475 hp i believe. Its very strong for a company truck.
     
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  6. KB3MMX

    KB3MMX Road Train Member

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  7. MACK E-6

    MACK E-6 Moderator Staff Member

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    Mine’s 450. Certainly gets the job done.
     
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  8. Perdeb

    Perdeb Bobtail Member

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    I have a 2019 t680 with x15 and ac clutch sometimes won’t engage to turn the compressor after restarting engine after running awhile . I have to kill engine again and wait a few minutes then restart then it usually works again , that is absolutely the only way to get it to work ,anyone had this problem?
     
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  9. TruckerTomPete

    TruckerTomPete Bobtail Member

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    I have a 2019 Peterbilt 567 with the 565 Performance X 15 I have 123500 miles on it not one issue so far pulls like a locomotive. Fuel mileage pulling 70 to 80000 high sixes. I have been driving for forty years and so far this is the best engine I have ever driven
     
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  10. Dave_in_AZ

    Dave_in_AZ Road Train Member

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    Bad sensor. The AC if it's like my ISX has 3 sensors associated with the fan clutch.
     
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