Hi Kevin,
We went from 5th wheels, to a class C, then a class A gasser, and a soon to be gone TT. Our 36' class A also got from 5-6 mpg. We pulled our 32' TT from eastern Texas to the east side of Wolf Creek Pass in Colorado (900 miles) with an F150 CC 5 1/2' bed, eco-boost engine. Averaged 7.5 mpg taking a route that did not go over any mountain passes. Also, just about got blown off the road on IH 40.
Wife & I drove the F150 back home and got a 2013 F350 CC short bed single rear wheel 6.7 diesel. Drove it back to Colorado averaged 17.8 mpg on the trip. Just drove home pulling the TT, went over two mountain passes (Raton and La Veta) on the way home and averaged 11.5 mpg. That is a 53% increase in mpg over the eco-boost pulling the same trailer over more difficult terrain.
We will be getting our new 5th wheel next week. It will be around 36' and not exceed 16,000 gvwr on the trailer. Our previous F350 was a 2000 cc srw with the 7.3 engine. It pulled our 35' NuWa HitchHiker without any problems. Ford then made some mistakes with their diesel engines but the new 6.7 seems to have a good overall track record and certainly has good power and torque.
Good luck with your decisions and choices.
Austin
