I bought the 2015 Lariat with
I bought the 2015 Lariat with the 5.0L V8. I towed an 8K lb travel trailer 7K miles on a loop through the west. I did okay but I didn't like the downshifting on grades and there were times on 6% grades it had a hard time keeping 45 mph. When I got back I traded for the 2016 Lariat with the 3.5L V6 Echoboost. While I have not gone that far west, there's a 6% grade near where I live. The V6 maintained the 55 mph limit with only one downshift to 5th. I was impressed and happy with the trade, not to mention liking the 2-3 more mpg.