Re: cheveron supreme 10w-30
NO
Question
What oil should I use in my four-stroke Yamaha Outboard?
Answer
Yamaha recommends Yamalube? 4-M FC-W? for all four-stroke models. Yamalube? 4-M is formulated to meet or exceed all Yamaha factory requirements plus the new FC-W? rating from the NMMA? (National Marine Manufacturers Association,
www.nmma.org). This standard specifies an oil formula designed for the unique needs of marine four-stroke engines, which operate in much different conditions than automobile engines. See the FAQ on ?Automotive Oils? for more information.
Question
May I use Automotive Oils in my four-stroke Yamaha Outboard?
Answer
No. Automotive oils are not designed for the operating conditions four-stroke outboard motors face, particularly moisture, cooler operating temperatures, and extended full-throttle operation under load. Oils for your car do not contain, for example, sufficient quantities of the superior rust and corrosion-resistant additives found in quality FC-W? oil. Oil with the FC-W? rating from the NMMA? has been specifically formulated for the tough marine environment. Yamalube?
4-M FC-W? meets or exceeds all FC-W? requirements.
