I had a 2012 fx4 ecoboost with the 3.73 max tow. Going from Minnesota to cooke city with a 4 place open aluminum trailer and 4 sleds at 80 miles an hour we averaged four and a half miles per gallon. It rode nice, was roomy and comfortable, and has good power. It swayed a lot when pulling heavy trailers anywhere near the max towing. I did install the add a leaf in the rear and e rated tires and it still had a hard time handling an 8000 pd trailer. Likes the truck a lot but ultimately went back to a diesel due to poor mpg. I only ever got around 14 mpg empty with the thing.