I'm confused I have a stock '02 E-350 suoerduty cube and I get 15 MPG. It's a box on wheels! The reason for the post is with the price of fuel I was considering buying an '05 F-350 crew 4x4 but after reading some of the posts it seems pointless I'd get the same MPG. If I bought this truck I would install a chip(Edge) cold air intake and a hi-flo muffler. Any input would be appreciated.