Jerry,
When we were camped at LBL last
fall, our next site neighbor had an
Escape 19 trailer and was towing with a Ford F150 2.7L Ecoboost. They came through the Smoky Mountains on the way to LBL and were very satisfied with the performance.
For a couple of years now, we have been towing a Scamp13 trailer with a 2014 Ford
Escape FWD 2.0L Ecoboost with excellent results. (Coming back from California, we went up and over Donner Pass with the cruise control set on 60 mph and never once slowed down.)
Last
fall, after the LBL trip, we were offered invoice pricing + ~$7K in incentives and rebates to purchase a 2016 Ford F-150. So, we (in accordance with Dave's recommendation

) bought a 2016 Ford F-150 XLT Supercab 4x2 2.7L Ecoboost with E-locking 3.31
axle + 20"
tires + tonneau cover. Using the new F150, we completed a round trip from the Kansas City Metro to South Carolina. Towing at 60 mph, we averaged about 22.5 mpg for the trip.
This year Ford has introduced a 10-speed automatic that only seems to be available on the 3.5L Ecoboost. There is also a rumor that Ford will introduce a 3.0L EcoDiesel to their F-150 line this year. If I were making a purchase decision this year, I think that I would have to take a look at those new options as well as the 2.7L Ecoboost.
As I have mentioned in other forum posts before, I think that the engine torque
at towing RPM is an important factor in both performance and economy when towing a trailer. The 10-speed automatic might help keep the engine RPMs in the "knee of the torque curve" range?
Turbocharged engines (like the Ecoboost) and diesel engines shine in the area of high torque at low RPMs.
Horsepower or Torque?
Measuring Torque and Horsepower - For towing, what's more important, horsepower or torque? | HowStuffWorks
Good luck with your decision(s)!
Ray