| abstract |
A lubricating oil for internal combustion engines, comprising: a base oil of a mineral oil and/or a synthetic lubricating oil; 0.005 to 0.2 % by weight, in terms of molybdenum (Mo), of molybdenum oxysulfide dithiocarbamate having a hydrocarbon residue with 6 or more carbon atoms on the average; 0.01 to 0.5 % by weight, in terms of sulfur (S), of zinc dithiocarbamate having a hydrocarbon residue with 6 or more carbon atoms on the average; 0.01 to 0.2 % by weight, in terms of phosphorus (P), of zinc dithiophosphate; and optionally a polymeric alkenylsuccinimide and the like. |