The possibility of manufacturing synthetic compressor oils for production of polyethylene is demonstrated. The propane-propylene fraction of catalytic gases or propylene from the EP-300 plant can be used as feedstock. After hydrogenation, fractions that totally satisfy the requirements for NKM-40 and NKM-200 mineral oils are separated from the oligomers. Wide-scale tests of these oils in compressors in the first and second levels of existing production of high-pressure polyethylene confirmed the possibility of using them to totally replace mineral oils.