David,
140 miles today, Fort Worth area back to S. Oklahoma, included some stop and go city driving in Grapevine to get to a nursery that had some blossoming plants hummingbirds like, several quick ramp entries to merge, 4 quick passes from 55 to 85 miles per hour (one of the REALLY nice features of the HAH); temp was in mid-70s: 39.5 mpg for the trip, not a bad feature there, either.
Lewis