I have a 2019 with the 5.0 and 10 speed 3.55 limited slip diff, and it handles towing my boat and utility trailers just fine. Put it in the tow/haul mode and it won't or rarely go into 10 as well as when slowing down it uses the transmission to downshift more to assist in braking. This one gets right at the same mpg as my 2015 w/5.0 6 speed 3.55 LS which is depending on traffic and how many stop and go's between 15 to as good as 17 mpg if it's just straight highway. Unloaded is where it really does the best, i drive to and from work everyday 70 miles round trip on the George Bush Autobaun and get 20 to 21 mpg even at 75mph. You don't dare to drive the speed limit unless you want to get run over. Plus it also has a sport mode that I don't use anymore because of a few close calls with law enforcement. There isn't anything I would hesitate to pull with it short of a 35' fifth wheel.

I agree completely. I have a 2018 5.0 W/10 speed. Just put it in tow/haul mode and hit the road. Just got back from a 700 mile trip. Got 21.7 MPG driving between 75 and 80. Love my truck.