Compression Ignition Addict
Join Date: Oct 2010
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There are a lot of factors that go into your fuel mileage. Wind resistance and rolling resistance are two of the biggest.
I pulled a 16,000lb horse trailer up to Yellowstone and back at 11.5 mpg and then pulled an empty 6,000 lb similar sized horse trailer from Boise and got 12.0mpg 10,000 lbs difference only gave me 1/2 mpg better. The rolling resistance and wind resistance were much more a factor than the weight.
Another example was a dump trailer with 2' sides that weighed 5,000lbs empty, drove 200 miles out to a quarry and picked up 8,000 lbs of rock and returned home. Got almost the same fuel mileage on the return as the outbound trip, But 8,000 lbs heavier.
I dragged a 5th wheel up to ND and got 10 mpg, Return trip hit a head wind and got 7.5 mpg with the same trailer.
Don't worry about that trips mileage, Look at your average over several trips and see how it does. And towing you will do a lot better if you slow down.
2015 F350 CC SRW LWB Lariat, Leveled, BAKflip, Ultra Predator wheels with Toyo A/T 295/65R20, Firestone Airbags and onboard compressor
2011 F350 CC SRW LWB Lariat - Gone