http://www.popularmechanics.com/cars...est+Content%29
VW has the right idea here(and gm with the ev1, sad story there). A car with a CDA(drag coefficient times frontal area) as low as this, at around 3.0, would still achieve massive mileage with a more normal power plant. It would require about half as much fuel to drive at 65 than most cars on the road. The cruze CDA is about 7.3, for comparison. My crx HF is around 5.4. Aerodynamics are a key element in econo cars, but nobody really seems to be able to put it together without the car looking hideous