Slicing Air

At 70 mph, 65% of a truck’s fuel is used to overcome aerodynamic drag.

AeroCivic achieves 95mpg at 65mphNextBigFuture:
Efficiency is a green fuel too. It is possible to improve mileage by 15-40% with an aerodynamic fix. One modder tinkered with his Honda to achieve 95mpg from his backyard AeroCivic.