| 摘要 |
PROBLEM TO BE SOLVED: To overcome: compatibility problems between friction modifiers and overbased detergents, such as overbased calcium sulfonates; and compatibility problems between different overbased detergents, such as between an overbased sulfonate detergent and an overbased salicylate detergent.SOLUTION: There is provided a method of improving the compatibility of an overbased detergent with a further additive in a lubricating oil composition. The method includes the step of adding an oil-soluble, hydrocarbyl sulfonic acid to the overbased detergent, with the proviso that, if the overbased detergent is an overbased phenate detergent, the further additive is not an overbased sulfonate detergent.SELECTED DRAWING: None |
