FORD V-10 mailage will be approximate depending on the speed.
At 55 Miles per hour speed.
Between 7 to 9 miles per gallon flat land small hills, more miles if going with the wind less if going against it.
Mountain driving is not possible due to the amount of terrain variation.
City driving is approx 4 to 6 miles per gallon less in stop and go.
Most of this is from my 2001 E-350 FORD V-10 24 foot motor home pulling a Suzuky Grand Vitara 2001 4 X 4 standard shift.
Chevrolet based RV's have diferent engines and rear end configuration and will have diferent milage.
navegator