Phillips 66® Injex TC-W3 2-Cycle Motor Oil is a premium quality, ashless engine oil specially designed for use in water-cooled and most air-cooled 2-stroke cycle engines. It is specially formulated to provide protection equivalent to many OEM-branded 2-cycle engine oils. It is TC-W3® certified by the National Marine Manufacturers Association (NMMA), and also meets API TC and JASO FB performance requirements for use in air-cooled 2-stroke cycle engines. It may be used in either direct injection (DI) or premix engines.