TC-W3 meets the specified requirements of all foreign and domestic 2-cycle outboard manufacturers. Our ashless TC-W3 is formulated from ultra-clean base stock oil to provide superior protection against piston scuffing, bearing wear, spark plug fouling, pre-ignition and rust. This formulation has outstanding lubricity and miscibility for better mixing of fuel and oil, resulting in a cleaner running engine. Contains no phosphorus. Will not void manufactures warranties!