Watercraft Hi Performance 4 Stroke 4W Engine Oil LUB-10W40-WV-12 Includes: (2) Quarts and Xfinder Sticker Provides the anti-corrosion and anti-wear performance needed in the harsh marine environment. Yamaha Lube Watercraft Hi Performance 4 Stroke SAE 10W40 4W Engine Oil Made by Yamaha specifically for Yamaha Specifically approved for the needs of high-revving four-stroke WaveRunner and Yamaha Boat engines. Provides the anti-corrosion and anti-wear performance needed in the harsh marine environment.