I am using an app on my phone called "Fuel Buddy". Currently it has me at 20.15 MPG. I normally fill up with 93 from RaceTrack although from time to time i have no choice and pull into a WAWA and fill up with 92. As far as my driving style, i'd say it is pretty relaxed although I will admit that from time to time I do put my foot down (Kinda hard not to with this car :crazy. Only add on i have on the car is an MBRP catback exhaust.Not at all. How are you driving the car? Any mods? Are you using the screen in the car or manually calculating? What brand fuel?