Abstract
Among the lubricating oils used onboard, the cylinder oil for two stroke diesel engines is used under the most severe conditions. Cylinder oil performance greatly affects a vessel’s safe operation because it is used for engine propulsion. Meanwhile, from an economical viewpoint ship owners always consider the reduction of cylinder oil consumption. It is, therefore, important to understand the properties of cylinder oil to ensure the safe operation of a vessel, and to reduce costs. Various laboratory tests/analyses on over 20 brands of oil from different companies were performed in order to evaluate the performance of these oils. There were evaluated comprehensively, based on the ranking of each test/analysis result. It is considered that oil performance is influenced by the type of base oil and additive used.
