On average, stock, is around 10 - 11L/ 100KM for city and 9.0 - 9.5L/ 100KM. I upgraded to a Greddy Ti-C Exhaust and Injen Cool Air Intake. Acceleration is much smoother and quicker now, and fuel economy is better.
Now around 9.2L/100KM when driving to work everyday. Highway havent test yet.
*Theres a bar on the small box in the middle of your RPM and Speedo, it gives u a constant fuel usage average, per 100KM.