The Compresyn HD PTS Series is made using high-quality mineral base-oils in order to provide greater lubricity for single-and two-stage air compressor applications. Formulated to provide extended hour drain intervals, they reduce fluid- and labor-related maintenance costs while providing enhanced equipment protection for the use in the upper cylinders and crankcases. These oils are used in compressors with high levels of ingestible contaminants or contaminant issues and are designed specifically for two-stage compressor applications. They have drain intervals of over 1,500 hours in properly maintained equipment.