I got 8.8 MPG on the way home on Monday. Pretty good head wind and not as much traffic as I was expecting. The trip was 55 miles and took about 1 hour and 10 min. only 20 miles on the express way and the rest on rural highways. Avg about 50 mph for the whole trip. I would like to see how it would do on a longer trip with more highway miles. Should be able to get about 10 mpg on a longer trip. The way home I did hit 75 a couple of times and that is when I started to feel the trailer move a little, brought it back down to 67-68 and it was fine. No problems when I passed the semi and did not feel any cars pass me either. Used the Tow/Haul mode the whole time and had the sway control off too.