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Old 09-27-2022, 04:26 PM   #1
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Real World MPG with Ford F350 dually pulling 42 foot 5er from NH?

Does anyone have any idea what mileage per gallon on a Ford F350 dually diesel pulling a 42 foot NH 5er we should expect? Or, what people actually get? Thanks.
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Old 09-27-2022, 04:37 PM   #2
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It depends. Into the wind 6.5. With the wind 9.0. I have a 40ft Majestic and 2017 F350 Dually platinum trim.
Danny N Stephens
2017 F350 Platinum Dually Diesel
2007 Titanium 28E33TS
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Old 09-27-2022, 05:02 PM   #3
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Generally, 7 to 9MPG running at 63, to 65 MPH. Once you start pushing over 65, the MPG drops like a rock. Our 5er is 19,000 LB rolling down the road.

Amateur Radio Operator (KE5DFR)|No Longer Full-Time! - 2023 Cougar 22MLS toted by 2022 F150, 3.5L EcoBoost Tow Max FX4 Lariat Travel with one Standard Schnauzer and one small Timneh African Gray Parrot, retired mechanical engineer
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Old 09-27-2022, 07:42 PM   #4
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Thanks that is pretty much what I was expecting

Going to NH on Friday October 7 to see the Ambassadors and 10 to 25 examples to walk through - thanks again
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Old 09-27-2022, 11:53 PM   #5
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My 42' Majestic, weighs 23,500 lbs loaded. Puller is a 2019 F350 Dually Limited with 3.55 gears. Daily mileage runs between 6.0 to 9.0 mpg depending on wind and terrain, but typically about 7.0 mpg. Truck alone without the trailer typically gets about 16 mpg highway thanks to the 3.55 gears that I ordered.
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Old 09-28-2022, 05:48 AM   #6
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2016 F350 Dually 6.7L, 3:73 rearend with the six speed auto. Trailer...Momentum 394M triple axle 20K GVWR trailer 13' 5" height. Total GCVW....~29,500 lbs

Last Sept we left the Knoxville, TN area on a trip out west, so fairly flat driving until NM, the AZ, then UT. Before we left, I zeroed one of the two tripometers and didn't touch it until we were home....5143 miles total. All but probably 750 miles or so was towing the Momentum. I used 625 gallons of diesel and averaged 8.2 mpg for the entire trip. Highway driving was done at 68 to 70 mph unless conditions caused slower speeds.

Your mileage will depend on rear end gearing, driving habits, terrain, total frontal area of the camper, transmission (6 speed or the newer 10 speed), winds, etc. There is no one answer because of all the variables.....but that was my experience and maybe help to give you an idea of what to expect.
2016 F350 Crew Cab Dually Diesel King Ranch 4x4
2018 Grand Design Momentum 394M Toy Hauler
Excessive Payload Capacity is a Wonderful Thing!
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Old 10-08-2022, 11:43 AM   #7
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We are getting about 8.5 - 9 pulling out 2020 40 Majestic with a 2020 F450 . They way we pull our rig it weighs around 24k . We usually travel in the 65 - 70 mph range.
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f350, ford

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