[wagonman76]

They said they couldn't just beat up the car because the metal would stretch and not make a true dimple. The only way I see to duplicate it without clay would be to either mold something... or take off each body panel and make a "dimple die set" and use a press to form the dimples. Or use some thin metal, dimple it with the die set, and then attach it to the car.

The air/water flow test did show improvement with the dimples, but it didn't really look like that much. I too am skeptical about 11%. I wonder what kind of air temperature or wind differences there were between all tests.