STARFIRE FULL SYNTHETIC GL-5 GEAR LUBRICANTS are multi-purpose lubricants designed for service in automotive and heavy duty applications. Starfire Full Synthetic GL-5 Gear Lubricants are formulated with synthetic base stocks and a sulfur-phosphorus extreme pressure additive package with friction modifier, which provides excellent thermal and oxidative stability, as well as anti-foam, anti-rust and anti-corrosion protection and have excellent load carrying capabilities. 6 Quarts/case 5 Gallon Pail 16 Gallon Keg 55 Gallon Drum