Splash lubrication is a method used to lubricate moving parts in machinery, particularly in engines. In this system, oil is stored in a sump at the bottom of the engine. As the engine operates, rotating components, like the crankshaft, dip into the oil, creating a splash that coats other parts, reducing friction and wear. This technique is commonly found in older engines and some small machinery. It is simple and cost-effective, as it does not require complex pumps or systems. However, it may not provide consistent lubrication at high speeds or under heavy loads, making it less suitable for modern high-performance engines.