I used to get only ~250 miles to a tank as well, but that was taking it to redline CONSTANTLY, cruising at 85-90, etc. etc.
If i really restrain myself, > 400 miles out of a tank is possible. But that's no fun at all.
If I drive normally to and from work (maybe strech out the RPM's a few times during the 30 mile trip, but not after every light), and drive hard on the weekends, I get around 300 miles to the tank. Which is a good amount, it ends up being something like 24mpg.
