I have known about the smaller Gulfstream Montaj motorhome of a few years ago. Never bothered to read the brochure though.
http://www.gulfstreamcoach.com/Montaj%20layout.pdf
On page 7 (of the pdf, pages aren't actually numbered) is a "Driveability" section. It has some shadow drawings of the Montaj and a typical Class A (like mine). They claim 33% less wind resistance.
No, not earth shattering, and not really very aerodynamic. But on topic here in this thread.
And do I believe the 13 MPG claims? Nope. But it would surely beat my 8 MPG @ 60 MPH. Imagine what it could have done with a more Vixen like shape...
