Patent ID: 8623797

Claim:
A method for improving the friction performance of a lubricating oil composition comprising: (a) a major amount of a base lubricating oil; and (b) a friction stability improving effective amount of an additive combination comprising: (i) at least one friction modifier comprising the reaction product of a borating agent selected from boric acid, an alkyl boron or an ester of boric acid with compound (1) where (1) is represented by the structure: wherein R is a C 6 to C 30 alkyl or alkenyl group: R 1 is a polyalkylene polyamine group represented by structure (II): wherein n and m are each independently integers from 1 to 6: and R 2 is an alkyl or aryl group or their heteroatom containing derivatives, or is selected from the structures III and IV below; and (ii) at least one oil-soluble phosphorus-containing compound, whereby the friction stability of the lubricating oil is improved.