An additive for oils that is capable of imparting oils such as lubricant base oils or fuel oils with superior wear resistance properties or superior friction resistance properties and the like are provided. The additive for oils comprising a compound represented by formula (I): [Chemical Formula 1] (A)m-W—(B)n   (I) wherein m represents an integer of 0 to 4, n represents an integer of 2 to 6, A represents hydroxy or amino, W represents hydrocarbon or the like, and B represents formula (II): wherein a represents 0 or 1, X represents an oxygen atom or NH, Y represents OR1 or NHR2 (wherein R1 and R2 each represent alkyl optionally having one or more substituents or the like), and Z1 and Z2 each represent a hydrogen atom, NR3R4 (wherein R3 and R4 each represent alkyl optionally having one or more substituents or the like) or the like, and the like are provided.