Driving 90 miles to RV dealership, we averaged over 22 mpg on our 2013 F150 Ecoboost driving 60-65 mph. Very windy day. Heading home with White Hawk 27DSRL, averaged about 9.9 mpg. Noticed truck rarely got out of 5th gear while going into head wind. Did not use tow/haul mode, as drive was on very flat roads.