varies wildly depending on use. at a trackday event it is in the teens, usually high teens (roadcourse like BIR and Road America) a cruise up to my grandparents hometown on 55mph roads running about 60 it is around 34mpg, driving on the interstate at 75ish is 30ish, driving around hill country just for fun at a controlled pace is generally around 24-25
overall average a few years ago with one trackday event at Road America and the drive to and from and only 800 other miles driven for fun was 25+
13 performance package car so 3.31:1 gears, manual transmission and a few "performance" mods running 299 hp to the ground according to one dyno...