Just curious what other ecoboost owners are getting for city and/or highway mileage? Mines been quite low (19-20l/100km) although I do have 35's and a slight lift, it still seems low. I am waiting for a "charge air cooler" from Ford as my truck has minor back firing and Ford says that's also a contributor to my poor mileage.
I guess its a common issue since they can't keep up with orders to have them replaced. Still about 4-6weeks out so hopefully that helps. Also have my edge tuner on economy setting currently.