Towed this trailer today with the Ford with the Aerolid mounted and I was getting a honest 20 mpg return at 55 mph. The trailer weighs 1100 lbs and only had nine 16 ft composite boards in it for decking. I used to get between 17 mph and 18 mpg towing this trailer with my 4 Runner. More of the trailer seems to be in the the shadow of the truck as the truck is wider and the Aerolid seems to make a big difference.