Those are overall mpg numbers, not straight highway or town. The 13.97 was over 5,000 miles and the 15.31 is over the 25,000 since. Probably lean toward about 60% town. Best I ever got stock was 15.5.
Last five fill ups were all highway trips to Midland and back with the exception of the 16, which was about 20% town. 15.5, 16.4, 16, 17.9, and 18.8. I got a driving award in there and decided to drive the speed limit...guess where...lol. Those are on IDP street tune, not race which has always gotten better mileage than anything else.