Quicksilver Premium TC-W3 Outboard 2-Stroke Marine Oil Quicksilver Premium TC W3 Oil is formulated to provide excellent 2-stroke lubrication for all horsepower outboards and other 2-stroke water- or air-cooled engines. An exclusive formula designed to help maintain peak engine performance, this ashless dispersant oil helps fight rust, reduce smoke, and control deposits that rob your engine of acceleration and power. Quicksilver Premium 2-Stroke Outboard Oil meets all the requirements of the lead