Product description mobil shc 630 series gear and bearing oil provides outstanding equipment protection, and outstanding performance in extreme service at high and low temperatures. This gear and bearing oil resists mechanical shear, even in heavily loaded gear and high shear bearing applications, so theres virtually no viscosity loss. In addition, the additive package in this gear and bearing oil provides exceptional resistance to rusting and corrosion, good anti-wear, foam control and multi-metal compatibility.