We have a 2014 F150, 3.5 Eco boost 4 Door Crew cab 4WD. My impression, power is plentiful and we average 17.4 mpg combined. We have 29,000 miles on it now and I drove it to BG this year driving 920 miles round trip towing a 22 enclosed trailer with my A body Buick inside traveling 65 to 80 MPH. I got 7.5 MPG, thank goodness for the 35 gallon gas tank. I have not seen the mileage some others are reporting. We had the 5.4 in the previous 2007 F150 but never towed this trailer and car for a extended haul.