I track my gas mileage using an app called fuel log pro, over 10,160 miles, I average 27.22 mpg, $1,124.47. 377 gallons and 81.3 miles a day, highest was 31.4, lowest 20.8
2009 4 door gti dsg 77890 miles
Edit:
How are you all getting over 31? I drive in a manner that I got 33 mpg out of a stage 3+ saab 9-5 rated for 27 highway.