Treating method of automobile engine lubrication oil

The invention discloses a treating method of automobile engine lubrication oil. The treating method comprises the following steps that firstly, a pleurotus eryngii cultivation material obtained after harvesting is smashed, water is added to carry out oscillation, and supernate is taken; secondly, Tween 80 is added in the supernate and mixed evenly; thirdly, THz waves with the wavelength of 10-120 micrometers and the frequency of 0.5-2.5 THz are adopted for irradiation; fourthly, polymethacrylate is added in the mixture irradiated in the third step and mixed evenly; fifthly, THz waves with the wavelength of 10-120 micrometers and the frequency of 0.5-2.5 THz are adopted for irradiation; sixthly, THz waves are used for irradiating the automobile engine lubrication oil; seventhly, the substance obtained in the fifth step is added into the irradiated automobile engine lubrication oil, and the mixture continues to be irradiated with THz waves. By means of the method, the lubricity of the automobile engine lubricat