mpg

Discussion in 'Freightliner Forum' started by Glenn West, Apr 22, 2018.

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  1. Apr 22, 2018 #1
    Glenn West

    Glenn West Light Load Member

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    Apr 22, 2016
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    My Truck, 14L Detroit, 435 hp, 340ish gearing, low profile tires. 10 speed. I tow my camper, 21k and carrry my SmartCar, 1900, on steel deck, 14' long. I get 6ish mpg. running 60 mph. Truck has 750,000. Has Detroit blowby. Doesn't seem excessive. Wondering if it needs an overhead. Understand Detroits need them more often. I do not use this commercially.
     
    Last edited: Apr 22, 2018
    Glenn West, Apr 22, 2018
    Glenn West, Apr 22, 2018
    #1
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  3. Apr 22, 2018 #2
    JohnnyC

    JohnnyC Light Load Member

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    Feb 17, 2009
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    I just had an overhead done on my 06 14L mileage improved @ 1/2 mpg. I haven’t noticed a performance improvement. It has over 1 mil.
     
    JohnnyC, Apr 22, 2018
    JohnnyC, Apr 22, 2018
    #2
  4. Apr 22, 2018 #3
    Bean Jr.

    Bean Jr. Road Train Member

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    Are you saying that with the deck for the Smartcar and the Smartcar, your tractor weighs 19k?
     
    Bean Jr., Apr 22, 2018
    Bean Jr., Apr 22, 2018
    #3
  5. Apr 22, 2018 #4
    Glenn West

    Glenn West Light Load Member

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    Apr 22, 2016
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    No. sorry about that. Smart is 1900. Changed that. Been meaning to weigh unit but haven't. I have added steel boxes under deck since pic also. Bobtail it will get 7. Thing is, it is a light load and wondering if I should get better.
     
    Glenn West, Apr 22, 2018
    Glenn West, Apr 22, 2018
    #4
    Bean Jr. Thanks this.
  7. Apr 22, 2018 #5
    Bean Jr.

    Bean Jr. Road Train Member

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    Wow , the difference between a pre-egr 12.7 and an egr 14! I am considering bobtailing from Chicago to the Iowa 80 Jamboree. My truck gets 12 bobtailing, and my wife's suburban gets around 13.
     
    Bean Jr., Apr 22, 2018
    Bean Jr., Apr 22, 2018
    #5
  8. Apr 22, 2018 #6
    Glenn West

    Glenn West Light Load Member

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    Apr 22, 2016
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    Everyone I know that use HDT to tow rv with get at least 8's. This is why I asking about this. I know the 12.7's were the king of mpg.
     
    Glenn West, Apr 22, 2018
    Glenn West, Apr 22, 2018
    #6
  9. Apr 22, 2018 #7
    AModelCat

    AModelCat Road Train Member

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    I'd say you aren't doing too bad. I run a 6.7L Powerstroke and I might get 8-9 mpg at 18k lbs total gross weight.
     
    AModelCat, Apr 22, 2018
    AModelCat, Apr 22, 2018
    #7
  10. Apr 22, 2018 #8
    Glenn West

    Glenn West Light Load Member

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    Only got 5-6 with my previous 2012 Duramax.
     
    Glenn West, Apr 22, 2018
    Glenn West, Apr 22, 2018
    #8
    tnevin225 Thanks this.
  11. Apr 22, 2018 #9
    TheDudeAbides

    TheDudeAbides Medium Load Member

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    Dec 5, 2014
    San Antonio, TX
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    My 12.7 will do around 9-9.5 when empty with a flatbed trailer. I’m right around 29k lbs or so. I got an overhead when i got it at around 429k miles. Has 635k now and still getting those numbers
     
    TheDudeAbides, Apr 22, 2018
    TheDudeAbides, Apr 22, 2018
    #9
    Bean Jr. Thanks this.
  12. Apr 22, 2018 #10
    Glenn West

    Glenn West Light Load Member

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    Apr 22, 2016
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    Your mileage is what most tell me about pulling their rvs. Some with these newer trucks are getting 10ish. I'm not complaining. I don't put enough miles to make a noticeable difference. What yall paying for an overhead?
     
    Glenn West, Apr 22, 2018
    Glenn West, Apr 22, 2018
    #10
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