I am in my Third F150.
Two where the 3.5L Ecoboost twin turbo. They now also have the 2.7 twin turbo. I also had rhe 5.0 Coyote engine.
2011 Ecoboost 3.5 city 18mpg highway 20 tow 11,800
2014 Coyote 15 city 18 highway towing 8,500
2018 Ecoboost 3.5 19 city highway 23 towing 13,000
My first choice based on less moving parts would have been the 5.0 on my 2018 but didn’t work out that way. The 2.7 liter only helps a few MPG. Only know issues on my truck was the cam phasers and twin pane sunroof track cracking.
My 2018 does drive beautifully and goes like a bat out of hell.