Volvo 3851039 Power Steering Trim Fluid The Volvo 3851039 fluid is designed for both Volvo Penta power hydraulic steering and power trim systems. The formula helps resist oxidation with excellent rust and corrosion resistance. Designed to help prevent deterioration such as seal swells that can cause leakage. Do Not Mix this fluid with other types of oil or steering fluids Features Superior rustcorrosion resistance protection Top notch low temperature performance Resists Oxidation Designed to