I bought my first truck last week: 2012 F-150, 3.5L EB, 2WD, 3.55 gearing, w/ 71k miles on it. So far I love it, but I'm concerned with the gas mileage I've been getting. Im averaging 14.8 mpg over the 300 miles I've put on it so far. 80% highway miles without towing or hauling anything. As far as my driving habits, I've been light on the pedal and generally keep my revs below 2500 rpm. Is there anything I should address in terms of maintenance that could get me to within the listed range for gas mileage (15/22)?