I have a 2011 Eco-boost with the 3.55 rear end.
I get 22 to 24 mpg most of the time on the interstate.
I get 12 to 14 mpg towing a 2000 boat and loaded truck from Lake Charles to Grand Isle.
It never bogs down. Pulls great but not like a diesel.
It's super fast off the line or passing, but you can't get HP if you don't burn BTU's.
It takes gas to get them horses running. No one is going to get good MPG towing, except if you have a diesel.
Boating magazine did an article about the 3.5L Eco against the 6.2L, towing the same boat.
The Eco won the overall due to milage without a boat.
The 6.2L had more HP and Torque but only had a slight advantage over the 3.5L.
Mine is 3 years old, with no issues yet.
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