So first 200 miles done and not as good as I hoped. I got 13.1 mpg going from 3200 feet over a 5300 ft pass and back down to 3200 on curvy back roads of western Montana. Tried to keep it a little under 65 but went faster down some open hills and slowed down to 50 going up some steeper ones. I guess that's not bad as I bet I'm over 4000 pounds maybe 5000 on the trailer with 3 adults and 3 kids in the Aspen.