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The Castrol HyspinTM ZZ hydraulic oil range of lubricants is based on a carefully selected ashless (zinc free) additive system designed to meet and exceed the most exacting performance standards. The Hyspin ZZ range is designed for applications requiring anti-wear and superior oxidation performance and is particularly suitable for hydraulic systems using vane and piston pumps where elevated operating temperatures are encountered. They are formulated for use in severely stressed systems in which high levels of anti-wear performance and/or ultra fine filtration are required. They have been proven to be resistant to the effects of dieseling in highly stressed systems such as plastic injection molding and fatigue testing equipment where the application leads to rapid breakdown of more conventional products.