My 2014 Tremor w/4.10s gets better than the EPA avg. (17) on the window sticker with MPT tunes.
Keep in mind the trip meter rolls over every 10k miles and some yahoo at the dealership cleared my trip meter with 7.6 miles on it.
And? It's 2wd, low to the ground and has an ecoboost doesn't it with low profile performance tires? My 14' Silverado 5.3 4WD pulls 2mpg more on the highway than the 22mpg on the window sticker too. Completely different trucks compared to a Raptor with heavy wheels/tires and all the wide body bits, bumpers etc.