I've 2007 model, filled by local petrol pumps where quality petrol can't be expected. 
I'm getting 480-490 with full tank, around 18-20km/l on long drives.
Within city, giving around 12km/l. My city too small, hardly goes above 60km/h. 
After getting 12km/l, I planned to sell it, but sooner I got 18, so I'm happy with it now.