Wish I could see 10 again. I pull a 14 ft enclosed trailer and am doing good to get in the 9's these days. usually around 50 a day in fuel.

 

Wow, Super heavy? My 5th wheel longest I have pulled it was to RRE, Total mileage was 1764 miles, and I used 166 gallons of fuel, also including some passes down the strip, and raising a little hell on the streets. Which averages to 10.6ish MPG roads are not exactly flat on the trip and I drive about 70-75mph. My GCVW was 19,580lbs.

I think you might have some issues, but could be driving habits I suppose.

 

Driving habits not awful since I drive it basically every day. try to keep it around 2000 or just under. trailer is tall and wide but not real heavy 5-7k probably depending how many windows I have in it that day. I used to get better but been steadily droping over the last few years.

 

Hell...I thought my cc, dually was big til an ex pulled up next to me ! I'd think those mpg #s are pretty good for a rig pushing that much air down the road.