it doesnt matter if you have 2000cc injectors! MPG in normal driving is all in the tune (and of course your lead foot). if your tuner flows xxx amount of fuel in the tune for highway driving, everyone should get mid to high 20's. and thats factory A/F readings, mine is 14.5 i believe if im not in boost or under maybe 20% throttle. if not, then your tuner doesnt spend 2/3 of his time tuning on the street so you have an ALL around bad ass car.
Scott-2011 WRX 335HP 394TQ 93 VF52!