Fuel mileage 5th wheel vs travel trailer

the fith wheel should get better milage due to less of a low pressur zone behind the truck. with a trailer you have two full blowen low pressure areas (one behind the truck and the other behind the trailer both causing drag as you drive. with a fith wheel the front one is reduced therefor less drag. if your truck is a short box you would get even better milage with the 5th but its up to you if the dealing with a sliding hitch is worth it.

I had a 29 foot 8000 lb trailer and I got about 12 mpg, then I got a 39 foot 14000lbs 5th and I went up to 16.5 mpg.

Steve