u can still get good gas mileage with a turbo car. it all depends on how u drive...if u drive around with out boosting much, then ur gas mileage will be around 25-30mpg on the freeway/highway with a GA-T.....at least thats what i got
haha my car eats gas too. Only because I'm a lead foot.
Also, if you have a leak somewhere, you'll get crappy mileage, even with normal driving (I've got a leak I'm gonna fix tomorrow, but I've got thru a nice tank of clean 93 in a week )