Buy a truck for the JOB, be careful
I have to hope FORD and others have figured something out, that goes against knowledge gained for the last say at least 20? years...
Pulling heavy loads, with minimal engine, usually meanst quick failures, unless the towing is only sporadic. Add a Turbo to this equasion, and it used to be a NO NO, as the heat genereated and the work applied to the smaller motor would grind an engine to a nub quickly...
but nowdays most of the aim is for a pickup that is driven to the office/shopping most of the time, that "might work" on weekends (dare I say never all weekends)... in that shape, is where the eco engine probably seems to shine?
Towing across country is just like trying to pull a 200 hp required implement (6 bottom mulboard plow in my following analogy) behind a hopped up 160hp tractor that they added turbo to get 200hp. What we found out, over and over was, with added Heat and Stress to make the 200hp on the smaller engines, shortley the engine was, well they fail pretty quickly.
Now hook that much bigger 300 Hp tractor, it sipped fuel pulling 6 bottom (we actually pull 9 bottom with 300 hp), it is never strained, will pull that little plow all day for many years, easily. But to use that 300hp tractor to spin something that needed only 20 hp like grinders, balers, lawnmower decks... then you had a problem with wasting fuel in that 300 hp tractor (aka you dont drive the big tractor to office or shopping, if you are worried about fuel economy).
just my $.02