Abstract: A lubricant composition of an oil of lubricating viscosity; an esterified copolymer with a backbone comprising units derived from (i) an ?-olefin monomer of at least about 6 carbon atoms and (ii) an ethylenically unsaturated carboxylic acid in a mole ratio of 1:3 to 3:1; and a polymer comprising olefin monomer units of 3 to 5 carbon atoms, wherein at least 50 percent by weight of such units contain fewer than 6 carbon atoms and wherein less than 5 percent by weight of such units are ethylene monomer units; exhibits good power transfer efficiency and elastohydrodynamic film thickness.

Abstract: This invention relates to an additive comprising a functional group derived from a first hydrocarbyl-substituted acylating agent and a functional group derived from a second hydrocarbyl-substituted acylating agent, where the functional groups are coupled by a functional group derived from an alkylene glycol. The invention also relates to an emulsifier component prepared by a process that utilizes the described additive and converts it to an emulsifier component by reacting it with a neutralizing component. The invention also relates to a process of making the described emulsifier component, and a method of customizing an emulsifier component in a composition by using the described additive and the described process for converting it to the described emulsifier component.

Abstract: A lubricant composition of an oil of lubricating viscosity; an esterified copolymer with a backbone comprising units derived from (i) an ?-olefin monomer of at least about 6 carbon atoms and (ii) an ethylenically unsaturated carboxylic acid in a mole ratio of 1:3 to 3:1; and a polymer comprising olefin monomer units of 3 to 5 carbon atoms, wherein at least 50 percent by weight of such units contain fewer than 6 carbon atoms and wherein less than 5 percent by weight of such units are ethylene monomer units; exhibits good power transfer efficiency and elastohydrodynamic film thickness.