If the OP is still hanging around....
I have a 2014 F-150 ecoboost 4X4 supercrew with max tow package. I tow a 35' 9,000# wet travel trailer using an equal-I-zer hitch. My tongue weight runs 1080#. Despite towing in some 30-40 MPH cross winds I have experienced no sway.
Towing in flat areas or moderate hills I get 9-10 MPG. I have no trouble maintain 55 MPH on 5 degree hills.
My mixed city/highway mileage averages 16.5 MPG
70 MPH interstate nets me 19 MPG while traveling secondary roads at 55-60 will turn 21-22 MPG.
