I have kept "Very Accurate" records for many years of our E350 described below, towing our Jeep Liberty, our MR2 Spyder, and also without a tow vehicle. I calculate trip average from the moment we leave home to the time we return home. All trips involve lots of driving from the Chicago area to USA national parks and such. Most RV driving is highway, most local driving is with the tow vehicle when we bring it.
Generator usage is NOT considered so actual mileage is better than stated.
- 2007 E350-V10 DRW Super Duty chassis with 55 gallon fuel tank.
- Aerodynamic B+ configuration with gently angled transition walls
- Dimensions: 23'-8" long, 93" wide, 9'-10" to the top of the a/c unit
Gas Mileage (5000-6000 miles driven per trip, practiced cruising speed ~67mph)
9.2 mpg towing Jeep Liberty 4x4 @ 4500 pounds
9.5 mpg towing Toyota MR2 Spyder @ 2200 pounds
10.5 mpg NOT towing
I stopped monitoring of fuel economy because the numbers were so consistent from one trip to another. I learned what I needed to know and no longer track it.
