Trailer aero devices help save mpg manager says. Sdc launches new aerodynamic trailer trailers. Integrated approach tractor trailer saves fuel in kw s. Mpg aerodynamic tractor trailer fuel economy. Aerodynamic side skirts on tractor trailers to improve. Aerodynamic trucks make me smile armstrong flight. Truck manufacturers look for ways to meet epa emissions. Tractor trailer aerodynamics truck wind deflectors freight.