Bumpyroad wrote:
a semi drives as far in a month as a RVer drives in a lifetime?
and if they really were a money maker, every truck/tractor would have one.
bumpy
Most over the road tractors do. They also have trailer skirts to keep the air out from under the trailer. They also have side skirts to keep the air out from between the tractor, and trailer.
And I'm thinkin. IF these aero add ons do no good. they wouldn't spend the thousands of dollars to install them. But they do work. We had one on our truck. Yes it increased the MPG. But only around one MPG. but you know. When you are only getting 4 MPG. ONE is a whole lot.