I do suggest better driving habits, including reducing highway speed when possible. I'll drive 75 at times, especially on a long trip, but I understand that I'm paying for it with increased consumption and have no valid reason to complain. Slowing down is the absolutely most effective way to increase mpg, but everyone has to make their own decision. Drive fast and burn more, or drive slow and burn less. One might also point out, if you dislike low mpg numbers, why drive an Expy in the first place? I happily drive my Expy and use only premium pure gasoline fuel, and have no complaints with mpg. For a large heavy vehicle, I think it does quite well. The nearest city is 40 miles, so at 60mph, I lose possibly 7 minutes in time, but save $$ at the same time. In the end, which is more important?