Abstract: The invention provides a method of lubricating containing: (a) employing a first functional fluid, (b) adding or contacting the first functional fluid with a controlled release gel wherein the controlled release gel has the desired additives to be released imparting the desired properties into the first functional fluid which is for lubricating a mechanical device; and/or adding a delivery system with the desired additives for a second functional fluid; (c) releasing the desired additives from the delivery system into the first functional fluid resulting in the first functional fluid changing into a second functional fluid, with the proviso that the second functional fluid is different from the first functional fluid.

Abstract: The present invention provides a composition containing: (a) an oil of lubricating viscosity; (b) an amine salt of a phosphorus compound; (c) a compound selected from the group consisting of: 1) a polymeric dispersant viscosity modifier wherein the polymeric dispersant viscosity modifier excludes copolymers derived from (a) a nitrogen containing monomer; and (b) methacrylic acid esters containing from about 9 to about 25 carbon atoms in the ester group; 2) a polymeric dispersant viscosity modifier, a borated dispersant; and a sulphurised olefin; and 3) mixtures thereof. The invention further provides a process for preparing the composition and a method for improving oxidation cleanliness of surface.