2001 Ford F-250 7.3L diesel crew cab long bed 4x4 with fiberglass top:
- 19-21 highway not towing
- 12-14 city not towing
- 15-16 towing 24' Tradewind (approx. 3800 lbs loaded) + 2 adults and 3 large dogs
- 14-15 towing 31' Sovereign (approx. 6000 lbs loaded) + 2 adults and 3 large dogs
In 50K miles, much of it towing, our overall average mileage has been 15.9 according to the on-board computer.
We love our truck, but I know my father's Duramax got much better mileage not towing (though it was an extended cab shortbed and much smaller) and similar mileage towing. However, we'd sure like to try the new 6.0 Powerstroke...