Some MPG Numbers
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New User
Joined: Aug 2010
Posts: 10
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Some MPG Numbers
I recently completed a 10 week trip with my truck and 5<sup>th</sup> wheel trailer and want to share the fuel mileage numbers.
First the truck: 2011 F350 6.7L PSD CC KR FX4 DRW. The truck weighs 8970# on the truck scales.
The RV is a 36 ft, triple slide, Avion Savannah 5<sup>th</sup> wheel. The RV weighs 15740# on the truck scales.
The numbers:
The total miles on the truck are 11550.
The total miles towing the trailer are 5105.
The calculated fuel mileages are:
City w/o the trailer – 14.00 mpg
Highway w/o the trailer (70 - 75 mph) – 16.24 mpg
Towing the trailer on mostly interstate (62 - 64 mph) – 9.78 mpg
First the truck: 2011 F350 6.7L PSD CC KR FX4 DRW. The truck weighs 8970# on the truck scales.
The RV is a 36 ft, triple slide, Avion Savannah 5<sup>th</sup> wheel. The RV weighs 15740# on the truck scales.
The numbers:
The total miles on the truck are 11550.
The total miles towing the trailer are 5105.
The calculated fuel mileages are:
City w/o the trailer – 14.00 mpg
Highway w/o the trailer (70 - 75 mph) – 16.24 mpg
Towing the trailer on mostly interstate (62 - 64 mph) – 9.78 mpg
Fleet Mechanic
Joined: Aug 2006
Posts: 1,764
Likes: 402
From: Logan, Utah
I have srw swb 350, 3.55 gears. You probably have 3.73? My trailer is around 18k. My mpgs are between 7.5 and 8.8 north of 72 mph. Plus I have 35in tires. Your numbers make me feel better. If I slowed down I bet id gain 1.
Mountain Pass
Joined: Apr 2003
Posts: 206
Likes: 1
I'd like to see a mileage thread sticky. Is there one? Or someone post a link to where there are a lot of posts for MPG's. My brother has a 2011 and told me he gets 14 towing a 8000lb trailer and he just got 18 mpg at 75/80mph on 300 mile drive empty. He does tend to lie a little.
More Turbo
Joined: Jun 2003
Posts: 610
Likes: 3
Thanks for posting your mph as well. That's always my first question when people post their mpg since I hear it can have a real effect on fuel economy. Although oddly enough you get close to my 450 with 4.30 on the highway but 3 mpg more then me around town. I would have expected the opposite outcome.
