I was towing an open 18' steel deck trailer with an 06 f150 5.4.. Towed very nice got about 13 mpg.. Stepped up to a 24' enclosed 10,000 gvw with a 08 f250 5.4 towes good on the flats hills suck gets about 9 to 10 mpg.. But no worry about road debris, rain and I can sleep in it..