Picked up my 08 F350 on 12/5. Loaded up wife and mother and headed to Delaware to visit our son. On the Pa Turnpike i averaged 18.6 mpg on the way out and 17.4 on the way back. Trip was from near Pgh to Wilmington. Kept the cruise on, the rpm at about 1750, and the boost at about 100 psi most of the way. Since it is uphill on the way back that accounts for the difference in mpg. That is using the computer calculation. My mph was set at 64. The truck ran great! Had one regen on the way.