Patent ID: 8901050
Filing Date: 2014-12-02
Classification: C10M,C10N

Abstract:
1. A method for improving copper corrosion performance in an internal combustion engine operated with a lubricating oil composition comprising (a) a major amount of a base oil of lubricating viscosity; and (b) a dispersant mixture comprising (i) a borated bissuccinimide, (ii) an ethylene carbonate post-treated bissuccinimide and (iii) a polysuccinimide, the method comprising (i) adding to the lubricating oil composition an effective amount of one or more copper corrosion performance improving agents of the general formula Si—X 4 or a hydrolysis product thereof, wherein each X is independently a hydroxyl-containing group, hydrocarbyloxy-containing group, acyloxy-containing group, amino-containing group, monoalkyl amino-containing group or dialkyl amino-containing group, and (ii) lubricating an internal combustion engine in need of improved copper corrosion performance with the lubricating oil composition.