| abstract |
PROBLEM TO BE SOLVED: To provide a lubricating oil composition excellent in friction reducing performance, particularly a lubricating oil composition suitable for an internal combustion engine. A lubricating oil composition comprising (A) at least one selected from a nitrogen-containing compound represented by general formula (1) and an acid-modified derivative thereof in a lubricating base oil. [Chemical 9] In (formula (1), R 1 represents a hydrocarbon group having 1 to 30 carbon atoms having a hydrocarbon group or functional C1-30, R 2 to R 5 are each independently 1 to carbon atoms 30 hydrocarbon group having 1 to 30 carbon atoms or hydrogen having functionality, X 1 is oxygen or nitrogen, X 2 and X 3 are each independently oxygen or sulfur, and p is 0 or 1, m represents 0 or 1, and n represents an integer of 1 or more.) [Selection figure] None |