Patent ID: 8569217

Claim:
A lubricating composition comprising an oil of lubricating viscosity, a dispersant and an amine-functionalised additive, wherein the amine-functionalised additive is derived from an amine having at least 4 aromatic groups, wherein the amine-functionalised additive is a product obtained by reacting the amine having at least 4 aromatic groups with a carboxylic functionalised polymer, wherein the amine having at least 4 aromatic groups is represented by the formula: wherein independently each variable R 1 is hydrogen or a C 1-5 alkyl group; R 2 is hydrogen or a C 1-5 alkyl group; U is an aliphatic, alicyclic or aromatic group, with the proviso that when U is aliphatic, the aliphatic group may be a linear or branched alkylene group containing 1 to 5 carbon atoms; and w is 1 to 10.