The CRC Sta-Lube® GL-5 Heavy Duty Gear Oil is a high-performance lubricant designed to provide superior protection and lubrication for your gearboxes and transmissions. This oil is formulated with advanced additives to help improve transmission efficiency and fuel economy. It helps to protect gears from high-pressure and heavy-load conditions, preventing wear and tear. FleetPride is your First Click in Heavy Duty®.