| 摘要 |
PROBLEM TO BE SOLVED: To reduce asphaltene precipitation or 'black paint' in an engine, in particular, a marine diesel engine and to reduce asphaltene precipitation or 'black paint' in an engine by using a lubricating oil composition including a Group II base stock. SOLUTION: A detergent includes one or more neutral or overbased alkaline earth metal 10-40C hydrocarbyl substituted hydroxybenzoates and (i) the one or more neutral or overbased alkaline earth metal 10-40C hydrocarbyl substituted hydroxybenzoates comprise one or more 10-40C hydroxycarb-1-yl substituted hydroxybenzoates or (ii) greater than 50 mole% of the one or more neutral or overbased alkaline earth metal 10-40C hydrocarbyl substituted hydroxybenzoates, based on the total number of moles of the neutral or overbased alkaline earth metal 10-40C hydrocarbyl substituted hydroxybenzoates, comprises one or more 10-40C hydrocarb-2-yl substituted hydroxybenzoates. COPYRIGHT: (C)2010,JPO&INPIT |
