Yes, I get 17mpg in the city. But that is shifting around 3K rpm and not letting the boost guage move at all. It can be tricky especially with my accufab throttle body but it is doable. When you are putting around, the blower is bypassed so it is like a NA motor. Under boost and mid to heavy throttle it can and will use some fuel, which is to be expected for the kind of hp these cars make.