The effect of ’soft’ mechanochemical activation in an air atmosphere of a mixture of clinoptilolite zeolite rocks with 10 and 20 wt % polyethylene glycol PEG-4000 on structure, physical properties, and oil adsorption properties was investigated. The doses of the applied mechanical energy were 2.16 and 5.04 kJ·g −1 . It is shown that clinoptilolite rock modified by 10 wt % polyethylene glycol with a mechanical energy dose of 5.04 kJ·g −1 and clinoptilolite rock modified by 20 wt % of this polymer with an energy dose of 2.16 kJ·g −1 have an oil capacity on the solid surface of 1.4 g·g −1 . We compared our results with similar data for polymer modifiers such as polyvinyl alcohol and polyacrylamide. We identified regular changes in the structure that can be used as a predictive assessment for the expected increase in the oil capacity of organomineral sorbents. It was found that in the IR spectra of these samples the ratio of intensities of absorption bands due to valence vibrations of siloxane and hydroxyl groups is not less than 3.2, and the porosity is not less than 72 %. The correlation between oil capacity and polymer content, porosity, and structural changes was revealed.