I was bored and wanted to test out the brakes. 100 miles later I was eating delicious tacos in Monterey. The Dart did great, 20 mpg with half the time 65mph and the other half stuck in stop/go traffic. Thermostat was rock steady at the bottom line until I shut it off 25 miles from home. After that more fluctuation, centered around the middle line (12 o'clock). Never got to line 3 so not overly worried, probably a bubble or a sticky thermostat. 235's make a much quieter 65mph cruise, I could get used to those tall tires in the back.