Just did my first trip with my 2016 with 3.92 gearing and running 60-65mph on a fairly hilly curvy highway and less than 300 miles on the truck and got 28mpg one way and 29mpg back and that also is at -12f with -20f windshield and some slush and snow on the road. I guess with a clean level road in the summer I should expect to see 32 or 33mpg.