I typically average around 26-27 MPG combined city and highway driving. On the highway, I get around 30 MPG at 70-75 MPH. I also have the 722.6 tranny, where revs are a little lower (I pul 2,500 RPM at 70 MPH).
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record