| 摘要 |
The invention relates to oil soluble additives particularly useful in heavy duty lubricating oil compositions, and to concentrates or lubricating compositions containing these additives. The additives are zinc salts of mono- or dicarboxylic acids, anhydrides, esters, etc., which have been substituted with a higher molecular weight hydrocarbon group has a number average-molecular weight (Mn) of greater than about 900. The metal salt additives are especially useful as detergents, or dispersants. |
