abstract |
According to the present invention, oleaginous compositions having improved stability are provided, wherein high molecular weight ashless dispersants and metal detergents are pre-blended at a temperature of at least 100°C for a period of from l to 10 hours, cooled to at least 85°C and admixed with additional additives, including oil soluble copper antioxidants and zinc dialkyl dithiophosphate antiwear agent. |