Sunoco Rock Drill Oil 320 is a heavily compounded oil designed for the lubrication of pneumatic equipment exposed to excessive moisture or water spray. It also is recommended for the lubrication of mining and industrial equipment operating in wet environments. It is formulated with an additive system that employs excellent extreme pressure protection as well as rust and corrosion protection, tackiness, and anti-foam properties. 320 represents the thickness of the oil which is an International Standards Organization Viscosity Grade (ISO VG) 320.
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