Rust Defense System protects engines from moisture contamination caused by running through streams and bogs or frequent short-trip service Superior anti-wear technology reduces valve-train wear, and piston and ring scuffing Superior deposit control - controls sludge and varnish formations for cleaner and cooler running engines Performs equally well in air-cooled and liquid-cooled engines Low volatility base oils minimize oil consumption. OIL 5W50 SXS 1 LTR