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2001400ex's avatar
2001400ex
Explorer
Feb 29, 2016

Fifth wheel vs toy hauler weight and mpgs

I was curious on some real world experience on the difference in MPGs between a lighter bumper pull and a fifth wheel toy hauler.

I first bought a 27 foot bumper pull that was marked as 5,800 pounds, but really was probably 7,500 dry. I pulled with a Chevy 6.0, a modded Ford 7.3 and 6.0, a 2002 Duramax and a 2008 Duramax and every truck got terrible mileage and struggled. So I got rid of it for a 21 foot Shockwave, which is 5,500 dry. Now I get 8-11 MPGs depending on speed and such. I have 3 quads, one in the bed of the truck and 2 in the camper. My typical trip through Montana I get about 9 MPG at 70 mph. (I get 11 at 60 MPH) my truck is a 2008 duramax 3/4 ton short bed crew cab.

I see that in 2013-2014 XLR made a Hyperlite model that is 30HFS that is about 9,000 dry. Everything I read and hear, fifth wheels are easier to pull off course, but I also hear that in similar size, the fifth wheel will get better MPGs.

I am curious if I can get similar MPGs with that hyper lite as my current setup pulling at similar speeds. My concern with MPGs isn't money, it's distance to the gas station. I frequently go on 12 hour drives in one day through Montana and northern Oregon where gas stations are often 50 plus miles apart. I also don't want a hassle towing like my 27 foot bumper pull was. My trip to the Oregon coast was 12 hours with the 27 foot, about 10 and a half with the 21 foot and around 8 empty.

Please let me know your thoughts and experiences going from a bumper pull to a fifth wheel.
  • Yeah with a hemi, I can totally see that. It's a strong engine, but not made for pulling a lot. Surprised that a same size fifth wheel would get much worse mileage.

    I do pull mountain passes in Montana. One trip I pull 3 of them, one of them is over 7,000 feet in elevation (it's a long gradual pull).

    I just worry about pulling the trigger and being irritated on my first trip.
  • 36' TT vs 36' FW. This is with a hemi mind you...

    "I felt the truck was over come by the added wind resistance the 5th wheel had vs a bumper pull. We traded a 36' bumper pull weighing 9,000 pounds loaded for this fifth wheel and the truck handle that camper very well averaging 9-10 mpg while towing it. I actually seen it slip into overdrive on many occasions with some of our long flat drives...

    once we traded to the 36' 12,000lb 5th wheel the whole thing changed... even empty coming home with it from the dealer i could sense there was way more drag... while the camper was empty the truck was able to reach 5th gear but never for very long... mostly ran in in fourth. once loaded and towing it ran 4th gear at the highest and netted me 4-6 mpg on even our flat trips..."

    He has since traded to a cummins.
  • Yes 5ers are higher but it doesn't really matter because it sits so much closer to the TV it acts as a single mass vs TV and TT which are further apart and act as two separate masses cutting through the wind. Advantage still goes to the 5er even though its taller because of where it sits relative to the TV.

    If towing a lot of hills the extra weight of the 5er is going to show in the MPG department. Towing on the flats probably a different story.
  • I know a few guys on the Ram boards that lost MPG going from a TT to a FW. These modern FW stick up into the wind 2-3 ft higher than most TT.
  • Thanks for the responses!!! Yeah like you say Bedlam, I'm thinking the wind resistance profile of a fifth wheel will offset the weight.

    That's why I've never liked the tests that websites like pickuptrucks.com do where they have a trailer with bricks on it for weight. I've towed a tractor on a flatbed and it was way easier to pull than a toy hauler even though the weight was roughly the same.

    Keep the comments coming. :-)
  • Wind resistance seems to be more of a factor than weight. I lost about 10% in mpg going to a taller truck camper pulling an enclosed trailer verses pulling my bumper pull toy hauler with the same truck carrying a cab high canopy even though my GCW and speed remained the same.
  • I have been pulling my 5er for 11 years, I can't remember what mileage I got with my tow behind.
    I can tell you this.
    With my 2006 F350 Dually, I got 7-8mpg doing 75mph.
    With my 2012 F350 Dually, I get 7-8mpg doing 75mph.

    No difference in trucks from a mpg standpoint, but the 2012 tows it like the trailer isn't even there.
    I set the cruise and it never shifts.
  • The 5er while heavier will have better aerodynamics which will offset much of the mileage loss due to increase in weight.

    Going from a 8Klb bumper pull to my 11-12K 5er is a bout a wash in terms of mileage on my 2012 Duramax
  • I actually got better mileage pulling my 39ft 5th wheel toy hauler than I did pulling my buddies 30ft bumper pull!! Pulling my smaller 30ft hauler I get about 12 Mpg at 65mph with the truck in my sig.