i went for 6-9k... i do about 4000 miles just to go to work and back, and probably about that much again when you add in all the stuff on weekends and nights...
if a car of mine is running, it's a daily driver... for over a year, that was the f250 ambo, which gets about 9mpg, the supra is in the mix again now, and it gets around 13-14mpg (or did last time the speedo worked) and while we were in the US, it was the Caddy, which we got up to about 10mpg by the time we left... we're planning on going back in August, so it's staying there for now, but when it gets back here, it's going in the car pool too