My apologies for responding to a post from November 2011. I still have that reborn and still get that kind of average .
Oil + filter change every 2500 km.
I cover that kind of distance in 3-4 months.
Air filter every 5000 km and the car takes 6 - 8 months to run that much distance.
Fuel is always Total Parco Regular RON 92 (No HOBC)
Tires inflated to 32 psi