Valvoline Anti-Wear (AW) ISO 32 Hydraulic Oil is formulated with group II base oils and premium additives for use in a wide variety of hydraulic systems.AW ISO 32 Hydraulic Oil i s zinc-based, non-detergent oil with excellent oxidation and demulsibility characteristics and contain rust and foam inhibitors.AW ISO 32 Hydraulic Oil has excellent D943 Oxidation Life, and a D665A/B no rust pass.