Lubrication of engine for ship

摘要: PROBLEM TO BE SOLVED: To provide a system lubricant composition for compression ignition engine two-step cross head ship.SOLUTION: A use in ship has less than 18, preferably 15 of TBN and is manufactured by containing following components or blending components. (A) large amount oil having lubrication viscosity 50 mass% more saturated material 90% sulfur 0.03% mixture thereof, (B) small soluble overbased metal, example calcium alkylsalicylate detergent, (C) polyalkenyl-substituted carboxylic acid anhydride alkylated phenol derived from polyalkenyl group polyalkene number average molecular weight 200 to 3,000, cashew nutshell liquid (CNSL).