OK friends. I've read fuel mileage for a 35' gasser with the v-10 Ford engine pulling a 3500 lbs toad will be anywhere from 4 to 9 mpg. This is average traveling, not all level and not all hills. ...
We run around 7-8.5 mpg. The high side is just the moho and towing the Ranger with the Harley in the bed (3,900lbs) puts us right around 7.5 mostly, depending where we are.
F53 chassis 6.8 V10, 5 speed auto, 31 foot total length, driving about 62-65 mph.