to solvent extraction treatment and then to hydrogenation treatment 4 a method in which the distillate oil is subjected to two or three stage hydrogenation treatment or after the two or three stage hydrogenation treatment it is further subjected to alkali distillation or sulfuric acid rinsing treatment 5 a method in which after the treatment of the distillate oil by the methods 1 to 4 as described above it is again subjected to dewaxing treatment to obtain a deep dewaxed oil and so forth can be employed the polyalkylene glycols and polyalkylene glycol ethers are used in the composition in an amount of about 5 to 25 by weight preferably about 10 to 20 by weight the alkylene group preferably contains 2 to 4 carbon atoms the molecular weight of the polyalkylene glycol is preferably about 190 to 9000 the viscosity of the glycol depends upon the lubricant it is to be added to and as to the final viscosity desired of the composition to which it is added the composition may optionally include a zinc dialkylthio phosphate in order to improve the film forming properties of the composition and to remove deposits preferably up to about 10 by weight of the zinc dialkylthio.