I tow a 35' 5'er weighing about 11k depending on how much is packed in. I have a 2010 F250 with the 6.4L. I completed a 1900 mile trip averaging 11.1 mpg and the motor only had about 5k on it. I'm expecting a LITTLE better as it breaks in. Your mileage seems a little low, but not too far...
Hey everybody! New memeber to the SDD forum here. Stepped up from my F150 S.Crew to my new 2010 F250 SD.
Got the White / Tan Lariat package with Camel leather interior and Lariat Ultimate package with the 6.4L. Will be using it to tow my 34' Jayco Eagle fifth wheel! :thumbs