The oil pan is usually formed of pressed steel. It usually holds 5 to 10 liters of oil, depending on the engine design .The oil pan and the lower part of the cylinder block together are called the crankcase; they enclose, or encase, the crankshaft. The oil pump in the lubricating system draws oil from the oil pan and sends it to all working parts in the engine, the oil drains off and runs down into the pan. Thus, there is constant circulation of oil between the pan and the working parts of the engine. There is constant circulation of oil between between and . A. the oil pan, the working parts of the engine. B. the oil pan, coolant C. coolant, water pump