These products contain the extreme pressure additives necessary for ultimate protection road cars and racing vehicles, as well as friction modifiers for proper limited-slip operation Fully-synthetic formulas created from polyol ester base stocks, offer excellent lubrication under extreme conditions. High viscosity-index (VI) to provide relatively constant viscosity and film thickness with varying temperature change. Ester base stocks and friction modifiers provide additional slipperiness to lower operating temperatures by reducing the sliding friction in hypoid gears Details: Sold as 5 Gallon Superior shear stability and reduced oxidation compared to other synthetics and conventional gear oils Exceed API GL-5 specifications Engineered to provide the highest degree of protection and improvement of differential efficiency for better mileage, longer drain intervals, and less wear Recommended for API GL-5, GL-6, MT-1, MIL-L-2105E and SAE J2360 Contains additional friction modifiers for suitability with clutch-type limited slip differentials - for most LSDs, no additional friction modifiers are required This product is not designed for use in manual transmission or trans axles with synchronizers, as its slipperiness may lead to shifting problems Popular in stock car racing differentials and transmissions API Service Class GL 5 Plus SAE Viscosity Grade (Gear Oil) 80W140 Vis at 100 degrees C, CSt 26 Vis at 40 degrees C, CSt 227 Viscosity Index 146 Pour Point, degrees C neg 40 Pour Point, degrees F neg 40 Brookfield Viscosity, Poise 500 at neg 26 degrees C