I have a 2012 F350 Reg Cab 4x4 with 3.73 gears and getting 12mpg around town. I don't use the highway much but I do wonder what my MPG's would be. Usually I cruise at 40mph and in 6th gear thats about 1,000-1,250rpm's.

Although I wish I was getting a few more MPG's I understand why I'm getting why I'm getting. One thing to mention, mpg's didn't change when I was carrying my plow or towing my 6x10 enclosed landscaping trailer with a Walker mower and plenty of tools.

For what it is, I think the thing is pretty sweet.
(Even if I have snake eye in my brand new paint)