I seem to average about 380km per tank, though when I fill it up, it's usually about 46 or 47 litres I'm filing up - I believe it's a 55 litre tank? Not quite game enough to try run it for much longer than that (the light comes on around the 370km mark).
Using 95 RON, tried 98 RON (BP Ultimate), but didn't notice any difference in fuel usage. The meter currently states 10.8L/100km, though a few months ago that was usually about 10.5L/100KM - not sure if it's the hotter weather or my driving style changing.
Gen 2 MPS (Series 1), mostly city driving (80km and below), little to no highway driving.