Yeah, I get about 13 in my truck empty.
I get 8 mpg towing my huge sail of an enclosed trailer.
I am hoping a diesel truck changes that. I'd be TICKLED with 17.5 mpg!
I get between 12-14 mpg towing my trailer with a vehicle in it with a total weight of up to 10K pounds. I've gotten up to 16 mpg towing the empty trailer that weighs 4700 pounds. I'm driving a 2018 Ram 2500 with the 6 cyl Cummins.