Yes, that is the gain, +7 mpg, give or take, when not towing. +7 relative to my last recollection of Suburban fuel use. An Ecoboost owner I know reports 11-12 towing a trailer and 21 not towing. Best I can muster in a 2010 Ram 1500 4wd 4.7L V8 is roughly 18mpg highway in what I consider normal driving. Maybe I could pussyfoot a bit more but I can't stand being passed by every vehicle on the road. I shoot for about 50/50 in that regard; I pass some, some pass me.