Wow. Didn't realize the tank is so big. Plus you must be getting about 10 mpg?
It gets 16/20.
It has the 5.0 V8 which seems to have decent mileage if you drive it easy. I had a 2013 F150 with the V6 Ecoboost, but it had so many problems i traded it for a V8. They get around the same mileage until you haul something, the Ecoboost gets much better mileage towing due to the twin turbos and small displacement engine.
I can get 22-23 on the highway if i go 60-65 mph, but i never do.
Now if i'm hauling a trailer it gets around 12.
We use my GF's Hyundai when we go out of town, which gets 35 on the freeway. Since we go out of town almost every weekend, i'm glad she has a car with good MPG.