Castrol molub-alloyog 936 sf heavy a (previously called molub-alloy 936 sf heavy a) is a uniquely compounded solvent free open gear lubricant developed specifically for use on heavy duty equipment in mining and industrial service. It is compounded to give maximum protection to gears and slides on large draglines and shovels while minimizing potential pollutants to the environment. A highly refined, viscous, paraffinic petroleum derivative is the foundation of a blended base fluid with excellent natural chemical and thermal stability. A proprietary blend of molub-alloy lubricating solids is included to promote anti-wear and load carrying properties beyond those of conventional lubricants. The Select lubricating solids work synergistically with chemical anti-wear and extreme pressure (EP) additives to reduce contact temperatures while providing excellent anti-weld protection under extreme pressure and shock loading.