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grizz272's avatar
grizz272
Explorer
Dec 14, 2017

Realilistic mileage with a fifthwheel.

Just curious what kind of fuel mileage I can expect with a fifth-wheel.
1ton 4x4 duramax srw 36 Ft. 13Klbs fifth-wheel. I realize weather, road conditions whether it is flat or hills or mountains all can make a big difference. Generally speaking flat lands like the whole god forsaken state of Illinois.

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  • rtyauch301's avatar
    rtyauch301
    Explorer
    Dec 14, 2017
    i did 14 last year from Huntsville Alabama to Columbus and back. my truck has also had a lot of work done do it and generally doesn't downshift on any but the steepest grades and maintains speed very well
  • valhalla360's avatar
    valhalla360
    Navigator
    Dec 14, 2017
    Diesel or gas will make a difference but figure between 8-12mpg with that size trailer.
  • mtofell1's avatar
    mtofell1
    Explorer
    Dec 14, 2017
    9-11 is pretty standard with reasonable speed and terrain. Lots of hills and/or speed you'll be at 9 or a bit below. 55mph on flat land and you can be up around 11-12 or above.
  • 4x4ord's avatar
    4x4ord
    Explorer III
    Dec 14, 2017
    rhagfo wrote:
    Earl E wrote:
    Yep. 8-10 no matter what you are towing.

    You must do all your towing at 70+, my 01 Ram gets 10 to 12 towing close to 12k. I would not expect much of a change going to a newer Ram.


    The old 6.5 GM, the early Duramax and those horrible old tractor engines got better mileage. My 2017 Ford seems to be doing better than my 2016 F350 when running empty. I haven't had an adequate opportunity to check it towing yet.......My '16 does about 10 mpg towing
  • guidry's avatar
    guidry
    Explorer II
    Dec 14, 2017
    I’ve got about the same setup as you and get 10-12 mpg towing. Not towing on fwy we get between 20-25 and best 50 mile average at 31 mpg (this afternoon in AZ).
  • CarnationSailor's avatar
    CarnationSailor
    Nomad
    Dec 14, 2017
    My 3/4 ton 4x4 duramax srw towing a 36 Ft. 13.5 Klbs fifth-wheel at 55 to 60 mph averages 10.5 over a mix of flat land and mountains.
  • rhagfo's avatar
    rhagfo
    Explorer III
    Dec 14, 2017
    Earl E wrote:
    Yep. 8-10 no matter what you are towing.

    You must do all your towing at 70+, my 01 Ram gets 10 to 12 towing close to 12k. I would not expect much of a change going to a newer Ram.
  • BStiers's avatar
    BStiers
    Explorer
    Dec 14, 2017
    I get 9.9 with my 2017 Duramax Dually towing a 40ft Toyhauler.

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