Oil pans are stamped or cast metal reservoirs affixed to the engine block’s underside, serving as the primary containment for engine lubricating oil. Positioned directly below the crankshaft, they provide both storage capacity and heat dissipation for oil. Integral features commonly include a sump for increased capacity, mounting points for the oil pump, and a drain plug for oil changes. Baffles within the pan minimize oil slosh during vehicle movement, ensuring consistent oil supply to critical engine components. Materials vary by application, typically utilizing steel or aluminum construction.