Never heard of Swepco oil? I'm not surprised. I have used their Swepco 203 gear lube enthusiastically for years. To my surprise, they make awesome motor oils as well. Swepco 306 is a superior friction reducing multi-weight engine oil for extended drain service in industrial/commercial and rolling stock applications. Has the advantage of multi-grade weights, for improved fuel economy and all-weather performance. Recommended where a 15w40 viscosity is desired and recommended by top Porsche engine builders for both street and race cars alike. Exceeds API SJ/CG-4. Features: Contains DIMONYL High VI solvent extracted paraffinic base stocks Exceeds most major engine manufacturers recommendations Contains detergent/dispersants Oxidation inhibitors Rust and corrosion inhibitors Anti-foam inhibitor Pour depressant Anti-wear inhibitors Superior friction reduction, cooler operating temperatures, reduced friction and drag, improved fuel economy and lower octane fuel needed. For shipping outside the continental 48 states, please call us at 815-472-2939 to place your order.