My fuel economy can be pretty ordinary in stop & go driving around town (approx. 450km to a tank), but over christmas i did a bit of a road trip to NSW and after 421km filled up the tank with 42.6L.
Very close to 10L/100km, which I was pretty happy with. Car stayed at high boost (0.8 bar), runs PFC, full zaust, a/m fuel pump front mount etc.
Says a lot for having a good tune I reckon.