Hi guys... today I have drained tank and than measured the real capacity... I have marked every liter on tank... reserve was just 0.3 litre.. than on factory 3 liter mark there were really 4 litres... on 6 litre mark there were 7.5 litres... totally full tank to top were 9.8 litres... now just wondering if 12 litre tank is really worth it.