I wanted to post this somewhere so this is the thread. I have been driving the truck lately quite a bit. I read on the F150 forum about learning to drive an ecoboost but did not know exactly what that meant until now.
Mine is the 2015 3.5L 3.55 rear. I have been able to increase my non-towing mileage 2 mpg just by accelerating differently and using the Gas Mileage bar on the dash. What I discovered is that the engine is highly sensitive to pedal movement.
The best way to drive is to accelerate quickly to the road speed and then cruise with a light foot. What I was doing before is accelerating slowly. The MPG gauge showed I was holding the mpg down low by doing that during the entire acceleration process. Getting to speed quickly is much better. I bet the same holds true for towing.
2015 Ford F-150 3.5 Ecobeast 3.55 Lariat