Patent ID: 8598099
Filing Date: 2013-12-03
Classification: C10M,C10N

Abstract:
1. A method of lubricating a mechanical device, comprising supplying a lubricating composition to the mechanical device, wherein the mechanical device comprises an automatic transmission or a continuously variable transmission (CVT), and wherein the lubricating composition comprises: (a) an oil of lubricating viscosity; (b) a first dispersant comprising a product prepared by heating together: (c) a second dispersant, wherein 0 mole % to less than 50 mole % of the second dispersant molecules contain a carbocyclic ring, wherein the second dispersant is prepared from a succinic anhydride from an “ene” reaction, and wherein the second dispersant substrate comprises a succinimide dispersant prepared by reacting a hydrocarbyl-substituted succinic anhydride with a polyamine and having a CO:N ratio of about 1:1 to about 1:10; (d) 0.005 wt % to 5 wt % of a corrosion inhibitor; and (e) 0.01 wt % to 6 wt % of a neutral or overbased detergent selected from a phenate, a sulphurised phenate, an alkylsalicylate, and a sulphonate.