"Power to pull 15,000 lbs up the Rockies and breaking to get you back down.Transmission control provides upshifts and downshifts when you need them. This truck will maintain speed limit on the way up and control the speed on the way down with very little braking needed. Front seats are as comfortable as any sedan and the cab is just as quiet. Most people can't tell it is a diesel. Mileage on the open road is as high as 32 mpg with around tow driving at about 16.5 mpg while full towing is from 9.5 to 12.5 depending on grades."