F150 Ecoboost vs F250 Diesel mileage

Well, I did 70.7 miles today and stopped at 3 customers. The trip computer is showing 1:59:40 for time so I wasn't hotrodding with an average speed of just over 35mph. It is also showing 11.1 mpg. At 15 miles into the trip I got on the interstate with the computer showing 10.1mpg. I did 10 miles of fairly hilly road with the cruise control on 66mph and the mileage increased to 10.7mpg so I was pushing 12mpg for that stretch. It seems like the diesel has more advantage at speed than it than it does going slow. The fuel cost per mile is about a wash so far but I will have the truck for about another 3 weeks so I collect more data. All of my trips are different but this one was fairly typical.

So far my favorite advantage of the 3/4ton is not have to mess with the torsion bars when hitching the trailer.