LUBRICANT FORMULATION AND METHOD FOR LUBRICATING COMBUSTION SYSTEM TO ACHIEVE IMPROVED EMISSION CATALYST DURABILITY

摘要

PROBLEM TO BE SOLVED: To provide a lubricant composition solving a problem of catalyst poisoning as a result of combustion of phosphorus in a combustion system. SOLUTION: In the lubricant composition comprising (a) base oil and (b) an additive composition including a zinc dialkyldithiophosphate component, a lubricant has a phosphorous content of less than about 800 ppm and a TEOST MHT-4 test yield of less than about 30 mg of deposit; and a TEOST MHT-4 volatile fraction has a phosphorous content of less than 100 ppm. COPYRIGHT: (C)2010,JPO&INPIT