Ultra1Plus SAE 80W-90 Conventional Gear Oil, API GL-5 is formulated with high viscosity-index, paraffinic base oil and specialty performance additives. API Category GL-5 designates the type of service characteristic of gears, particularly hypoids in automotive axles under high-speed and/or low-speed, high-torque conditions. Specialty anti-scuffing additives and friction modifiers provide advanced protection and lubricity in extreme pressure conditions. Additionally Ultra1Plus SAE 80W-90 Conventional Gear Oil, API GL-5 is highly shear stable while also resisting rust, oxidation, foaming, and varnish.. Typical Properties: SAE J306 Viscosity Grade: 80W-90 Appearance: Amber Liquid Viscosity @ 40°C, cSt, ASTM D445: 139.8 Viscosity @ 100°C, cSt, ASTM D445: 15.5 Viscosity Index, ASTM D2270: 115 Flash Point, °C, ASTM D92: 210 Pour Point, °C, ASTM D97: -30 Exceeds Performance Requirements: API GL-5