Reducing a vehicle’s aerodynamic drag can improve a car’s fuel economy, say automakers. Not only can designers make it easier for a car to push through the air, automakers report drivers can also pull their weight by removing unused bike, ski or luggage racks off the vehicle’s roof. The video below includes general views of the Chevrolet Volt and other aerodynamically designed cars, soundbites on improving fuel economy and an edited package on how to save on gas by reducing a car’s wind resistance.