https://www.campingworld.com/yamaha-yamalube-4m-4-stroke-outboard-engine-oil-quart-321538.html
Yamaha Yamalube 4M 4-Stroke Outboard Engine Oil, Quart
Semi-synthetic oil with an exclusive additive blend works to guard against ring stick and carbon buildup.
4 stroke outboardyamalube 4mengine oilyamahaquart