<p>The use of thickening agents in the composition of industrial lubricants remains an important trend associated with the need to develop effective base formulations for rotating machinery lubricants. The use of both individual polymer compounds and block copolymers for thickening of petroleum and synthetic lubricants allows the desired viscosity of lubricating compositions to be promptly achieved. However, the solubility of such polymer structures in different types of oils remains a poorly investigated area. The lack of knowledge leads to an inefficient use of research resources. In this paper, we aim to empirically generalize information on the solubility of styrene-based block copolymers and lower olefin hydrocarbon-based polymers in the base oils of compressor lubricants.</p>