I have the 2.7 in a 2017 Explorer. Nice engine for that, but wouldn't want one in a pickup. My 2017 F-150 super cab 4WD has the 5.0, and I'm getting 18mpg. A nephew has the 3.5 in his farm truck, and he pulls a gooseneck trailer all the time, and is very happy with the engine.
A Ford salesman told me back when I was looking for a truck, that they called the F-150's with the 2.7, "city trucks," as they didn't think the engine was enough for someone that actually used a pickup for hauling and towing heavy loads.
