We are looking at a low mileage 2005 ford v10 gas with 4.10 gear ratio, 6.5 foot bed. We need to tow a Nuwa, max weight of fifth wheel 14,100. Tongue weight 1890. This truck has the tow package optio...
Being an F-250 and depending on suspension mods it may or may not have, you may need airbags or something like Timbrens or maybe even an add a leaf to handle to tongue weight and not squat to much. Mileage will be abysmal! A great and dependable engine but thirsty she is. With your weights think 5-8 mpg depending on terrain, weather conditions, and how heavy your right foot is while towing. Unloaded probably 10-12ish and maybe slightly better highways with a gentle foot.