Everybody has their M3TH now for few months already and has pretty good amount of road time already. I already have 3.2K miles on my odometer already. I have a almost the same route 4 days week a mix of little town and mostly highway driving. Normal to moderate style of driving brings me around the 20-24 mpg only. Whenever I do full interstate driving at 60-80 mph I have a better result of 27-29 mpg. Everytime I fill up my " miles to next gas indicator is 240-250 miles. Since I got this car I always load it with 91 octane. BTW only mod I made to my M3TH is the Magnaflow Axle Back.