Citgo Marine Plus 2 Cycle Engine Oil is recommended for all water-cooled two-cycle engines, but also may be used in many air-cooled two-cycle engine applications. This premium oil effectively fights wear, scuffing, deposit build-up, and lubricity to provide longer life to your engine. Citgo Marine Plus Oil is designed to be used on naturally carbureted outboard engines. It also helps prevent piston ring sticking and reduces carbon. The improved lubricity provides increased engine efficiency and provides a cleaner, better-running engine that produces less smoke. It can be used in direct injected or pre-mix systems. It can be used in applications that require an NMMA TC-W3, TC-WII or TC-W type oil. Marine Plus oil can also be used in many air-cooled 2-cycle engine applications requiring API Service Category TC.