STARTEC HYD Fluid Hydraulic Oils are high quality hydraulic oils formulated from premium quality, low evaporation base oils and fortified with anti-wear, anti-rust and oxidation inhibiting additives for superior performance. Highly oxidation resistant. Low Foaming. Excellent deaeration and demulsifying properties. Retain high levels of cleanliness. Good compatibility with elastomers. Possess good extreme properties to protect sliding surfaces against wear. Exhibit minimal changes in viscosity under higher operating temperature.