That is Ecoboost towing fuel consumption. They can pull but use lots of fuel. My 2014 5.0 with 3.73's averaged around 20l per 100 on a trip pulling a car carrier in February which saw everything from 120k cruise speed to 45k per hour in 6" of snow. Drove from Toronto to Washington return in those conditions.
This is the same reason why I wouldn't recommend an Ecoboost on a lifted truck. Fuel consumption gets bad.
2016 F150 Lariat Sport , Screw 5.5', 3.5, 3.55, 2/3 Ground Force lowering kit, 22 X 9 KMC MC5 wheels, Atturo 305/45R22 tires, Powerboards, Putco bumper grille, Pace Edwards tonneau, Dee Zee Mat, Tailgate Pong liner, Huskyliners, AMP Bedxtender, custom graphics and more mods to come.