Just ran about 400 miles on a trip in my '19 Classic 5.7 CC, 5'6" bed, 4x4, tonneau cover, stock SRA tires, level, no muffler, Trutrac diff. A great deal with cruise set at 78 and half the trip was a bit windy. Calculated and display matched at 18.5 mpg. I had my wife and three kids with as...