Valvoline 80W90 Light and Heavy Duty Semi Synthetic Gear Oil is designed for the protection and lubrication of gears in high-stress conditions. It works effectively in heavy duty applications as well as trucks and heavy machinery, using a blend of advanced additives and premium base oils to protect against wear and tear.Here are the key features of this synthetic gear oil:GL-5 compliant formulation: Engineered with premium base oils and cutting-edge additives, it provides exceptional protection for gears and transmission components under heavy load conditions, ensuring longevity and reliable performance.Advanced additive system: Includes a modern additive package designed to prevent deposits, corrosion, foaming, and oxidation, reducing the risk of gear failure and maintaining optimal functionality even in extreme conditions.Extended drain capability: Built with high-quality synthetic base oils, it offers robust protection against oil breakdown, allowing for extended service intervals a