Lubricating oil composition with improved oxidation retention and reduced sludge and varnish formation

A composition comprising:

• a combination of at least two oils of lubricating viscosity selected from API Group II, III, IV or V base stocks and mixtures thereof;
• an alkylated phenyl-α-naphthyl amine having an alkyl group from about 8 to about 12 carbon atoms and being present in an amount from about 0.1 wt% to about 0.7 wt%;
• and
• at least one oil soluble triazole or derivatives thereof, present in the amount from about 0.05 wt% to about 0.5 wt%,
• wherein the oil soluble triazole or derivatives thereof comprises at least one oil soluble diphenylamine tolutriazole reaction product,
• and at least one sheared antifoam solution wherein the sheared antifoam solution has a mean particles size from about 0.01 microns to about 0.5 microns.