Sunoco Sunvis 632 Ashless Hydraulic Oil is a premium lubricant used in high pressure hydraulic systems, circulating systems, compressors and machine tools. The "600" series is a group of premium hydraulic fluids that do not contain zinc anti-wear additives and are referred to as Ashless. Because they are zinc-free, they are the preferred lubricant used in environmentally sensitive areas where soil and water contamination could be an issue. 32 represents the thickness of the oil which is an International Standards Organization Viscosity Grade (ISO VG) 32.
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