6.8 V10 E450 mpg on Ford

Bordercollie wrote:
Plan on 7-8 mpg when budgeting for a trip. Typical Class C's have a lot of aerodynamic drag and rolling resistance due to the overall weight. The drag builds up a lot as you go faster than 50mph. Tires should be inflated to proper pressures for your rig (not too soft). I have gotten as high as 9 mpg and as low as 7mpg depending on wind conditions, level terrain vs mountianous,and traffic conditions with slowing and accelerating.Cost of fuel in an RV is only a small part of the total cost of ownership and operation.

Agree with all but the last sentence. Fuel costs are one of the largest costs in RV ownership-possibly second only to depreciation. Depending on fuel prices typically $4000-$5000 per 10,000 miles. Or $40,000 to $50,000 per 100,000 miles. Maybe we'll catch a break on some of this if the fuel prices stay low.