Sump basins and sump pumps must be maintained. Usually the bottom end is dry sumped using a Tsubakimoto dry sump pump. It had different camshafts and a redesigned sump and oil pump. Other conditions for sump planning are maintenance and pump drawdown. The relationship of pump capacity and sump size is inverse. The engine uses dry sump lubrication system. Engine lubrication is via a dry sump oiling system. A further criterion for sump planning is accounting for the pump capacity. There is debate about which variety of sump pump is better. The equivalent of a sump on a boat is the bilge. The lubrication system used a wet sump and an oil cooler. The engine makes use of a wet sump designed lubrication system. The aluminum cylinder liners were Nikasil-coated and the engine block has a cast-aluminum oil sump. The dry sump lubrication system was also modified. European specification cars used dry sump lubrication.