Thought I would post this here as well. Yesterday I trailered my rig about 42 miles. I captured 20.1 miles of the trip on my trip log going 67 mph and the computer said I was getting 18.1 mpg. I will get 22mpg at 55mph typically. I have pulled this rig now for over 14500 miles on my 80 mile round trips over the past 4 years.