My SVT gets 20 or 21 every time I've check it, but I'm hoping to get high 20s on road trips (possibly to Vegas next month, if I don't fly).
My previous ride, a '92 Nissan Sentra XE 5spd, got as much as 45 MPG on road trips. Needless to say, the SVT was a shock in this department... (but it was also a shock in the speed department, which makes up for it.

)
--T.J.