DIY ‘Boat Tail’ Gives Little Car Big Fuel Economy | Autopia | Wired.com

In his endless quest to squeeze every possible mile from a gallon of gasoline, our friend Darin Cosgrove has given his econobox a homemade boat tail. It boosted his fuel efficiency by 15.1 percent @ 55 mph.Original Source: DIY ‘Boat Tail' Gives Little Car Big Fuel Economy | Autopia | Wired.com