The new 4-Stroke Quicksilver oil has been specifically formulated to keep the engine "cool" even when the going gets "hot". It is a multi-viscosity oil to be used at any time during the boating season. It helps reduce engine wear and corrosion, protect bearings from chemical wear, keep pistons clean, prevent ring sticking, and inhibit rust and other deposits. It meets API SG/CD specifications for use in diesel and gasoline engines. SAE 25 W-40.