Patent ID: 11926804
Assignee: AFTON CHEMICAL CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A passenger car motor oil lubricating composition suitable for improving at least one of deposits, sludge, oxidization, and wear, the passenger car motor oil lubricating composition comprising:
a blend of base oils of lubricating viscosity including one or more API Group II base oils and one or more API Group III base oils and/or one or more API Group IV base oils;
oil soluble nitrogen-containing dispersant additives comprising (i) at least one boronated oil soluble nitrogen-containing dispersant additive and (ii) at least one non-boronated oil soluble nitrogen-containing dispersant additive wherein the oil soluble nitrogen-containing dispersant additives provide an amount of dispersant boron (B), an amount of dispersant nitrogen (N), and a dispersant total base number (TBN) to the passenger car motor oil lubricating composition, wherein the dispersant TBN of the oil soluble nitrogen-containing dispersant additives is about 1.0 to about 1.28 mg KOH/gram as measured pursuant to ASTM D2896, and wherein the oil soluble nitrogen-containing dispersant additives provide no more than about 200 ppm of the dispersant boron to the passenger car motor oil lubricating composition;
metal-containing detergent additives including (i) at least one calcium-containing detergent additive and (ii) at least one magnesium-containing detergent additive;
wherein the passenger car motor oil lubricating composition has a ratio of the dispersant boron, the dispersant nitrogen, and the dispersant TBN provided by the dispersant formula B/(N*TBN) of less than 0.2.