Lubricating oil compositions with viscosity control

A method for improving viscosity control, while maintaining or improving deposit control and cleanliness, of a lubricating oil in an engine or other mechanical component lubricated with the lubricating oil by using as the lubricating oil a formulated oil, said formulated oil having a composition comprising a lubricating oil base stock as a major component;

• and at least one oligomeric or polymeric aminic antioxidant and at least one monomeric aminic antioxidant, as minor components;
• wherein the at least one oligomeric or polymeric aminic antioxidant dissipates over time in the lubricating oil during operation of the engine or other mechanical component;
• wherein the at least one oligomeric or polymeric aminic antioxidant and the at least one monomeric aminic antioxidant react to form in situ at least one regenerated oligomeric or polymeric aminic antioxidant during operation of the engine or other mechanical component;
• wherein the lubricating oil base stock is present in an amount from about 1 to about 95 weight percent, based on the total weight of the lubricating oil;
• wherein the at least one oligomeric or polymeric aminic antioxidant is present in an amount from greater than about 0.1 to about 10 weight percent, based on the total weight of the lubricating oil;
• and wherein the at least one monomeric aminic antioxidant is present in an amount from greater than about 2 to about 10 weight percent, based on the total weight of the lubricating oil.