Just finished first little xc trip in my 2011 f 250 6.7 4x4. Mostly interstate, about 68 mph, some in town. Did 19.6 for the trip. I am thrilled. I now have 2600 on the truck and have averaged 17.6 since new. This is as good as my 97 7.3 which had 5 speed and 3.55 2x2. Love this new ford f 250. Im hoping for some improvement as it breaks in a little.

 

16.5 city, 22.8 on the highway at 70mph, and 14.8 on the freeway with a 30' toyhauler while doing 65mph.

 

Very nice. I have 20's and 3.55 rear end. How about you? Also, how many miles on your truck?

 

18's. 3.55 gears, and about 9200 miles on it now.

 

Very good. Im looking forward to this or better. I had 97 7.3 for 14 years. Last July lost my head, bought a dodge 6.7 laramie. 12-14. Sold it a month ago and got back in a ford. All is right with my world now. Like the new truck a lot and it just feels "natural". Good luck with yours.