I don't drive too hard. My commute is 22mi each way, about 70% freeway at speeds of 75-80mph. I will run full-throttle through 3rd gear when getting on the freeway, so at least one full-throttle run each way. I also do my best to keep revs below 3500 (3000 if possible) and out of boost until the temp guage hits the normal spot. I average about 23mpg.