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. **We are so confident we craft the highest quality powersports oil in the industry that we will warrant the performance of Yamalube in your new Yamaha vehicle's or other qualified product's engine for 20 years or 100,000 miles (5,000 hours of operation if no odometer), whichever comes first.