Sinopec GL-5 Synthetic Heavy Duty Automotive Gear Oil is a high-performance gear oil, formulated with high-quality synthetic base oil and an advanced multifunctional additive system to meet the requirements of API GL-5. Designed for the lubrication of hypoid gear sets in passenger vehicles and commercial vehicles, where they offer excellent extreme pressure (EP) and anti-wear properties. The very high viscosity index, provided by the fully synthetic formulation, ensures excellent low- and high-temperature performance and reduces gear wear at low-temperature start-up. Excellent thermal and oxidation stability minimizes the build-up of deposits and varnish, reducing wear, extending component life, and ensuring longer oil life. Protection against corrosion and rusting extends equipment life and reduces maintenance costs. Good oil film thickness protects against gear wear, scoring and pitting, and also prevents corrosion or spalling of gear surfaces. 5 Gallon Pail (18L – 4.75 GAL)