Abstract: A lubricant composition comprising a base oil; at least one additive; and 0.001-10% by weight, based on the total weight of the lubricant composition, of an organic compound comprising both a polar moiety and a nonpolar moiety, as lubricity improver, wherein the organic compound has a relative permittivity ?r in the range from 1.5 to 10, and a quotient ?S1/?S2 for the organic compound is in the range from 1 to 25, wherein ?S1 denotes the sum total of the area(s) of the IR absorption band(s) in the wavenumber range of 3100-2750 cm?1 in an ATR spectrum of the organic compound, and ?S2 denotes the sum total of the area(s) of the IR absorption band(s) in the wavenumber range of 1800-1650 cm?1 in an ATR spectrum of the organic compound.