I have a 2015 F-150 with the 3.5L Ecoboost on order. Looking forward to seeing what kind of fuel mileage I can achieve with it. Currently drive a 2006 5.4 Liter F-250, lucky to average 10 mpg. Luckily I do not put a lot of miles on, currently at 64,000. I'll let you know what I get with the new truck.