A lubricant composition comprising: A) a lubricating oil, and B) 0.2 to 5 wt%, based on the weight of the lubricant composition, of ii) a compound of formula II iii) a compound of formula III or iv) a mixture of compounds of formula II and formula III, wherein: n is from 1 to 20, R is C 1-18 alkyl; C 1-18 alkyl substituted by a carbocycle comprising 5 to 12 carbon atoms or a heterocycle comprising 3 to 11 carbon atoms and one or more heteroatoms selected from O, S and N, wherein the carbocycle or the heterocycle may be substituted by one or more C 1-12 alkyl or alkyloxy; C 2-18 alkyl interrupted by one or more -O-, carbonyl, carbonyloxy and/or substituted by OH; C 2-18 alkyl interrupted by one or more -O-, carbonyl or carbonyloxy and substituted by a carbocycle comprising 5 to 12 carbon atoms or a heterocycle comprising 3 to 11 carbon atoms and one or more heteroatoms selected from O, S and N, wherein the carbocycle or heterocycle may be substituted by C 1-12 alkyl or alkyloxy; or a carbocycle comprising 5 to 12 carbon atoms, or a heterocycle comprising 3 to 11 carbon atoms and one or more heteroatoms selected from O, S and N, wherein the carbocycle or heterocycle may be substituted by C 1-12 alkyl or alkyloxy; and R' is C 2-18 alkylene; C 2-18 alkylene interrupted by one or more -O-, carbonyl or carbonyloxy and/or substituted by OH, carbocycle comprising 5 to 12 carbon atoms or a heterocycle comprising 3 to 11 carbon atoms and one or more heteroatoms selected from O, S and N, wherein the carbocycle or heterocycle may be substituted by C 1-12 alkyl or alkyloxy; or said alkylene, interrupted alkylene or substituted alkylene interrupted by a carbocycle comprising 5 to 12 carbon atoms, or a heterocycle comprising 3 to 11 carbon atoms and one or more heteroatoms selected from O, S and N, wherein the carbocycle or heterocycle may be substituted by C 1-12 alkyl or alkyloxy, wherein each R and each R' may be the same or different from any other R or R'. A) a lubricating oil, and B) 0.2 to 5 wt%, based on the weight of the lubricant composition, of ii) a compound of formula II iii) a compound of formula III or iv) a mixture of compounds of formula II and formula III, ii) a compound of formula II iii) a compound of formula III or iv) a mixture of compounds of formula II and formula III, n is from 1 to 20, R is C 1-18 alkyl; C 1-18 alkyl substituted by a carbocycle comprising 5 to 12 carbon atoms or a heterocycle comprising 3 to 11 carbon atoms and one or more heteroatoms selected from O, S and N, wherein the carbocycle or the heterocycle may be substituted by one or more C 1-12 alkyl or alkyloxy; C 2-18 alkyl interrupted by one or more -O-, carbonyl, carbonyloxy and/or substituted by OH; C 2-18 alkyl interrupted by one or more -O-, carbonyl or carbonyloxy and substituted by a carbocycle comprising 5 to 12 carbon atoms or a heterocycle comprising 3 to 11 carbon atoms and one or more heteroatoms selected from O, S and N, wherein the carbocycle or heterocycle may be substituted by C 1-12 alkyl or alkyloxy; or a carbocycle comprising 5 to 12 carbon atoms, or a heterocycle comprising 3 to 11 carbon atoms and one or more heteroatoms selected from O, S and N, wherein the carbocycle or heterocycle may be substituted by C 1-12 alkyl or alkyloxy; and R' is C 2-18 alkylene; C 2-18 alkylene interrupted by one or more -O-, carbonyl or carbonyloxy and/or substituted by OH, carbocycle comprising 5 to 12 carbon atoms or a heterocycle comprising 3 to 11 carbon atoms and one or more heteroatoms selected from O, S and N, wherein the carbocycle or heterocycle may be substituted by C 1-12 alkyl or alkyloxy; or said alkylene, interrupted alkylene or substituted alkylene interrupted by a carbocycle comprising 5 to 12 carbon atoms, or a heterocycle comprising 3 to 11 carbon atoms and one or more heteroatoms selected from O, S and N, wherein the carbocycle or heterocycle may be substituted by C 1-12 alkyl or alkyloxy, wherein each R and each R' may be the same or different from any other R or R'.