Just thought I'd report that our new 2012 Ford F-250 Supercab 6.7 PSD (3.31 rear gear) got 23.7 MPG on first road trip of approx. 360 miles driven at an average speed overall of 64.8 mph. Pretty amazing new Ford Super Duty,and the power is there too--400 HP and 800 ft lbs of torque. Hope this kind of mileage doesn't fall off too much when we hook up our fifthwheel in Dec for our annual Florida escape. Anyone have any experience with the new Reese/Ford Elie Series fifthwheel hitch that we will be towing with?