System designed to lubricate the moving parts of an engine.
Note: It usually consists of a pump that draws oil from a reservoir called the sump and passes it through a filter before distributing it under pressure to the various working surfaces. The oil usually returns to the sump by gravity.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM