Had to take my Grand Dog to the vet to get a shot in Mattawan, MI. I get on I-94 at the 23 mile marker and get off at the 66 mile marker. And their is about 3.5 miles of stop and go at either end. I had plenty of time and drove only 65 mph and 60 in the 8 miles total of construction both ways. My computer showed 35.5 mph. From checking it dozens of times again a fill to fill, I know it's about 5% optimistic. So my actual MPG was 33.7 mpg