We averaged 23.9 MPG on the highway, and 20.9 MPG overall for the 800 miles we drove. I was very surprised how good it was. I was thinking we'd get more like 17 MPG average, but we drove 60 MPH on the highway because @mendoza followed us in his landcruiser, and he refuses to take it over 3000 RPM. Thanks @mendoza for saving us money at the pump.
Combined MPG reported on Fuelly.com: 2019 3.6L Wrangler Rubicon 4x4: 16 2019 3.5L Ecoboost Super Cew 4x4 F150: 17 2019 3.5L Tacoma TRD Offroad 4x4: 17 2019 4L 4Runner Offroad 4x4: 17
The much bigger F150 gets the same or better MPG as its smaller competitors for three big reasons. First, the Ecoboost has direct injection which gives more control to how much fuel is put in each cylinder which creates a leaner burn. Second, the Ecoboost turbo allows for a smaller displacement while still providing high HP and Torque output. And third, the F150 is made of an all aluminum body which is much lighter than the other steel-bodied vehicles.
The F150 we rented weighed 4917 lbs, while the much smaller Tacoma weighs 4425 lbs. The F150 delivers 20% more horsepower per ton than the Tacoma.
Us Californian's were stoked with how cheap gas was in Utah: