Y'all have seen material added to tractor trailers and cars (underside) - diverting wind at hwy speeds to smooth out air flow turbulence. It must work if they add it to the rigs. Its also my impression that this helps cars. Does anyone have experience with adding this to the underside of our trucks to save 1-2mpg? It would also protect them from the elements like this crap they put down on the roads for salt on the east coast..
