I have a 2015 edge sport. After 10000km I would get 30 mpg(sometimes more) on pure highway driving at 65 to 70 mph....very conservative, no heavy acceleration. In town with really mild driving we would see 18 to 21 mpg. Now if I get a heavy foot, which is very easy to do in the sport, fuel mileage goes out the window....Ive seen as low as 10 to 11 mpg in town and 16 mpg on the highway. I find with the sport if you can keep out of the turbo and really baby the acceleration it does have the potential to get good fuel mileage.....but dam its tough to not play with the power the sport puts out....very addictive. So to sum everything up, I would say driving characteristics is the biggest factor in fuel economy with the 2.7tt edge sport.