ok... bad idea for the van...
But, I'm just looking at options that could fit any car.
I just tested my suzuki SX4 2007 and I got 30.57MPG (us) on 50miles on both city and higway. I was EOCing very often... I'm not satisfied with that result. I thought there would be way...
Have you heard about this project:
http://99mpg.com/ProjectCars/ewheelforanyvehicl/