Low drag mirrors

[TLyttle]

What does rocket science and NASA have to do with drag? Aerodynamics can be a hobby as well as a science: more than once I have been involved in tufting a car in order to find a source of gas-eating turbulence, it ain't that hard, and the results are worth the time and effort.

Re the sedan: just the mud patterns on a sedan give you a hint, ie, there is far less mud on the back of a sedan after driving in crappy weather. This means that the air stays stuck, and the turbulence and rotors are smaller, ie, less drag. I consistently get better fuel mileage than my buddy's hatch, and we both drive about the same.

Folding in the mirrors may or may not make a difference, depending on the shape presented by the folded mirror, and the turbulence generated. Somehow, I don't think the difference would be easily measured. Now, skinning the underside should change things a lot, but not always for the better...