What are the lubrication methods for an engine?

[VanSkylar]

There are three lubrication methods for an engine: pressure lubrication, splash lubrication, and gravity lubrication. Pressure lubrication involves using an oil pump to forcibly deliver lubricating oil to various friction surfaces. This method is generally used for parts that experience significant force and relatively high movement speeds during operation. The lubrication intensity for engine components depends on their environment, relative movement speed, mechanical load, and thermal load. For periodic lubrication, grease is periodically applied to less critical and scattered parts, such as the engine water pump bearings, generator, starter, distributor, and other assemblies. This method can be used for such components.