MOBIL SHC 630 Synthetic Gear & Bearing Oil is a supreme performance gear and bearing oils designed to provide outstanding service in terms of equipment protection, oil life and problem-free operation enabling increased customer productivity. MOBIL SHC 630 Synthetic Gear & Bearing Oil is a scientifically engineered oil formulated from base fluids with an inherently high viscosity index and a unique, proprietary, additive system which enables these products to provide outstanding performance in extreme service applications at high and low temperatures, well beyond the capabilities of mineral oils.