2013 Ford F250, 6.7 Diesel, Suggestions to improve mileage.

First question would be about your driving habits. I have a 2012 F350 6.7. I am not an overly aggressive driver, but neither do I putter around. The difference in my "normal" driving" and driving for economy (meaning gradual starts, no hard acceleration, coasting up to stop lights/signs, staying under 70 on the highway, etc) is in the order of 2 1/2 to 3 mpg. Mixed driving is about 15. Highway under 70 is about 20. Towing 5er is 10 - 12 depending on conditions (terrain, wind, etc.)