Bought 2014 eco used in May of 2017 with 45000 on it. Put 5000 miles on it on a trip to Iowa in July of 2017. Got 22.5 mpg doing 80 and 24.5 mpg doing 65. Just got back form hiking the Grand Canyon and got the same mileage. truck is 4/drive with 3.92 gears. Any one else getting that kind of...