Patent ID: 8598098

Claim:
A lubricant composition for an automotive vehicle, comprising: a base oil for a lubricating oil, wherein the base oil is suitable for use in an automotive vehicle; an oxygen-containing organic compound which is constituted of carbon, hydrogen and oxygen and has a hydroxyl group; a diamond nano-particle; and a dispersant for the diamond nano-particle, wherein the dispersant is different from the oxygen-containing organic compound, and wherein the dispersant is selected from the group consisting of: a dispersant containing polyoxyethylene alkyl ether within a range of from 5 to 15 mass % and polyoxyethylene alkyl ether phosphate within a range of from 85 to 95 mass a dispersant containing polyoxyethylene dialkyl phenyl ether within a range of from 10 to 15 mass % and polyoxyethylene dialkyl phenyl ether phosphate within a range of from 85 to 90 mass %, a dispersant containing sorbitan monooleate, a dispersant containing sorbitan dioleate, and a dispersant containing sorbitan trioleate.