Does the shape of the front wall on a TT affect MPG?

[OnTheGo]

More specifically, does a TT with the wedge shaped front get better MPG by cutting the wind. They are advertised as so. I'm curious if anyone has real numbers.

[82corvette]

When we bought our 308fbs we were told that & it actually pulls easier in the wind. We ended up getting the same mileage because our Jayco is heavier than our old Terry.

[Seann45]

Yes they do... Also a cap on your truck bed will effect it... you can see, from the bug line, where the wind hits on my RV..