Seachoice Hydraulic Steering Fluid is engineered to ensure optimum performance for marine hydraulic steering systems. It provides outstanding antioxidant performance in ASTM D2272 testing, as well as superior anti-wear and anti-corrosion capabilities. It can be safely used in all hydraulic applications recommending an ISO 15 fluid. ISO 15Synthetic blendAnti-corrosion & anti-wearFor all marine hydraulic steering systems, including Evinrude G2Can be used to top off fluids or as a flush and fill