Yesterday I took my first medium range trip in the new ‘19 Limited Max, 4x4, tow package. We did a quick round trip from Cincinnati to Knoxville and back. This was our third tank of gas and the first I have used to check the truck’s computer. I do reset the trip computer at each fill up. We left Cincinati with 138 in town miles on the trip meter and a computed average of 16.8 MPG. After going through Kentucky (hilly, but nothing serious) then up Jellico (a somewhat serious climb) and in to Knoxville then back to Lexington where I refilled, the Computer showed 21.1 MPG as the average for the tank. My computation after refueling was 19.7, or 1.4 MPG less than the computer. By necessity, I filled up at a different pump than the initial fill on this run, so that may make some difference. Also, as this is the first tank I have checked, I don’t have an established track record and this may or may not be indicative of long term performance of the computer. When I got home with just under 100 miles on the refilled tank, the computer was showing 23.4 MPG, which, if off by the same 1.4 MPG is still 22.0 MPG. I am not at all upset with the mileage I am getting. Further, I will hand compute MPG for a while to see if there is a trend with my Expi’s computer. I can’t say I have ever had a vehicle that was dead on with MPG calcs, but some have been closer than others. In most cases, the bias was fairly consistent. I am just curious what others are seeing with the accuracy of their on-board computer MPG numbers.