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I have a F-250 6.4L Diesel, Super cab, short box truck with Toyo Open Country tires 275/65R20 tires inflated to 65 psi.
I drove my truck from Carlisle, PA to Frankenmuth, MI through the mountains I averaged 6.9mpg on flat terrain I averaged 8.2 mpg. I am towing a 5500# Intech trailer with a 3000 pound car. My trailer is 8.5' high.
I was reading in car and driver magazine they tested the 2008 F250 6.4L Diesel Vs. V10, they stated that the truck pulling 8500 pounds averaged 14.1 mpg over various terrain.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.