What kind of oil do you put in a Yamaha wave runner?

For a Yamaha WaveRunner, you should use a high-quality two-stroke or four-stroke oil, depending on the model. Yamaha recommends using their own brand of oil, such as Yamalube, which is specifically formulated for marine engines. Always refer to the owner's manual for the correct oil type and specifications to ensure optimal performance and longevity of your WaveRunner.