Forum Discussion

Canadian_Camper's avatar
Canadian_Camper
Explorer
Dec 19, 2017

MPG on 5.7L Hemi

Hi... we’ve just sold our 2001 Dodge Ram CTD and we’re currently looking at ordering a 2018 Dodge Ram Outdoorsman crew cab with a 5.7 L Hemi with a 6’4” Box.

Our travel trailer is a 24’ I-Go, weighing in around 4,000 lbs.

What we’re having trouble finding, is what kind of average gas mileage we can expect towing a trailer the size of ours.

Anyone out there towing a trailer similar with a Dodge Hemi 5.7L that can give us some real figures?

Thanks!
Tow Vehicles
  • Canadian_Camper's avatar
    Canadian_Camper
    Explorer
    Dec 20, 2017
    SoundGuy wrote:
    Canadian Campers wrote:
    Hi... we’ve just sold our 2001 Dodge Ram CTD and we’re currently looking at ordering a 2018 Dodge Ram Outdoorsman crew cab with a 5.7 L Hemi with a 6’4” Box.


    Which transmission, which axle ratio? Both will have a direct bearing not only on how well the truck tows but also fuel mileage - or lack thereof. ;)


    8 speed automatic with 3.92’s
  • SoundGuy's avatar
    SoundGuy
    Explorer
    Dec 20, 2017
    Canadian Campers wrote:
    Hi... we’ve just sold our 2001 Dodge Ram CTD and we’re currently looking at ordering a 2018 Dodge Ram Outdoorsman crew cab with a 5.7 L Hemi with a 6’4” Box.


    Which transmission, which axle ratio? Both will have a direct bearing not only on how well the truck tows but also fuel mileage - or lack thereof. ;)
  • Ron3rd's avatar
    Ron3rd
    Explorer III
    Dec 20, 2017
    The 5.7 Hemi gets similar mpg to the 5.7 Tundra. Budget and plan on 8-9 mpg. Then you'll be happy when you get better, and you will get better, and you will get worse. Plan on 8-9 and you'll be happy. Nobody on this forum can say you will get 11 mpg overall; too many factors involved like up-hill down-hill, etc.
  • SoundGuy's avatar
    SoundGuy
    Explorer
    Dec 20, 2017
    LadyRVer wrote:
    I would think 12-15 if you have a light foot? Maybe someone with a trailer about your weight will chime in.


    Count on 10 miles to the US gallon just as we all do and you'll be in the ballpark. My 19' Coachmen averages ~ 4800 lbs loaded & ready to camp and towing with my 5.3L Silverado I typically see 10.5 to low 12s, depending on terrain and wind.

    12 mpg - maybe, but 15? Now that's funny! :p
  • GordonThree's avatar
    GordonThree
    Explorer
    Dec 20, 2017
    Never saw better than 11mpg with my previous 5.7 towing the trailer in my signature. That was better than my 6.4 which gets roughly 9.

    Towing speed 55-60, cruise control, tow haul mode on.

    These are numbers from the computer, I don't really care about numbers enough to mess with manual calculation.
  • LanceRKeys's avatar
    LanceRKeys
    Explorer
    Dec 20, 2017
    I don’t know about mpg, I would guess 11. I would be very interested in what you think of your new truck after towing with an older diesel. So after your first trip, would you mind posting a report?
  • Lwiddis's avatar
    Lwiddis
    Explorer II
    Dec 20, 2017
    “Our travel trailer is a 24’ I-Go, weighing in around 4,000 lbs.”

    Wet and loaded your I-Go weighs 4,000 pounds at 24 feet? Not what I’m seeing on line. Have you weighed it? At 22 feet my Winnie is 3,740 pounds dry and 5,100 ready to go.
  • LadyRVer's avatar
    LadyRVer
    Explorer II
    Dec 19, 2017
    Towing a 31' fifthwheel, gross loaded weight about 9,600.. got a 2013 2500 CC LB 5.7 Hemi..... light foot, 55-58 mph.. around 9.5 to 10 mpg.

    So, guesstimate on half the weight of your trailer? I would think 12-15 if you have a light foot? Maybe someone with a trailer about your weight will chime in.

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