What serves as both a cover for the bottom of engine block and reservoir oil?

The oil pan serves as both a cover for the bottom of the engine block and a reservoir for oil. It is usually made of metal and is attached to the bottom of the engine block. The oil pan is designed to collect any oil that leaks from the engine and to prevent it from leaking onto the ground. The oil pan also acts as a reservoir for the oil that is used to lubricate the engine's moving parts. The oil is pumped from the oil pan to the engine's moving parts by the oil pump.