Well this weekend with just over 1000 miles on my 2011 F150 XLT Supercab, Ecoboost with a geared 3:73 rear. I pulled my 6x12 Haulmark enclosed trailer. It is a box style trailer with a cone nose. Had about 1000lbs of weight inside. Furniture items. Drove four hours one way at posted speeds in Michigan and Ohio. I was not happy with what i got in MPG's. Only 10-11 mpg. Now next month I plan on pulling my 27ft travel trailer at about 7200#.

I got about 8-10 mpg with my old 5.4 F-150.

Now, as for pulling that trailer. Could not feel any major drag at all. (note: bed is covered) Now, when I needed to pass a larger truck or people that don't know how to drive the power was there no doubt about that.

Overall I am happy with the tow in general and willing to try again with the travel trailer. Now, upon returning to normal driver I have gotten between 17 and 21 mpg. That I do like!