Reliability and availability are of paramount importance to all users of internal combustion engines. Inherent engine design reliability must be complemented by a suitable periphery and the appropriate choice and treatment of working media such as lubricants and fuel. CIMAC Working Groups have a long tradition of preparing recommendations and guidelines for the internal combustion engine industry and its users. In performing this work, CIMAC takes advantage of its wide and competent international membership; Working Group -"Lubricant" is truly worldwide, with active members from Japan, U.S. and all round Europe/Scandinavia. Specialists from all relevant background - Equipment/Engine Manufacturers…