abstract |
MOTOR OIL COMPOSITION COMPRISING A MINERAL LUBRICATING OIL CONTAINING IN COMBINATION AN ALKYLATED DIPHENYLAINE, A ZINC DIHYDROCARBYL DITHIOPHOSPHATE, A HYDROXYALKYL HYDROCARBLY THIOPHOSPHONATE, A NITROGEN-CONTAINING METHACRYLATE POLYMER AND AN OVERBASED CALCIUM SULFONATE AND METHOD FOR OPERATING AN INTERNAL COMBUSTION RECIPROCATING ENGINE. |