i was extrapolating the 16.5l/100 km to the full tank @ 71 litres to give 430l per tank..... never fill up once per week and have never gone below 1/4..... however i must say some weeks i'm at half a tank after only 200km (400km per tank).... some times i'm at just above 1/4 after 400km (550km per tank)so it varies alot depending on the trips i make i suppose......