Here's some official figures
http://autoweb.drive.com.au/cms/A_53...wsarticle.html based on a 2001 model.
My experience will be different but possibly similar, on a stock setup, with a stock ECU, you should be able to get an average of 300-350kms on a full tank - in a city driving environment with lots of start stop traffic.
Unfortunately I can't help you with highway kms as I've never done that yet - maybe someone else can. I'm quite sure also that a stock setup runs a little rich.