| abstract |
Lubricant compositions comprise a lubricantnbase oil, and (A) a mono substituted amide typenbissuccinimide in an amount from 0.5 to 20 percentnby mass, (B) zinc dithiophosphate in an amount fromn0.05 to 0.3 percent by mass of phosphorus, and (C)na metal-based detergent in an amount form 0.5 to 4.0npercent by mass of sulfated ash, based on the totalnmass of the composition. Lubricant compositionsnpreferably further comprises (D) a dispersant typenviscosity index improver in an amount from 0.1 ton20 percent by mass, based on the total mass of thencomposition. |