An oil pump is a mechanical device used to circulate oil in an engine or machinery. Its primary function is to ensure that oil reaches all moving parts, providing lubrication and reducing friction. This helps to prevent wear and tear, ensuring the engine operates smoothly and efficiently. There are different types of oil pumps, including gear pumps and rotary pumps. They can be driven by the engine's crankshaft or an electric motor. Proper oil circulation is crucial for maintaining optimal engine performance and longevity, making the oil pump an essential component in vehicles and various industrial machines.