Clean oil is essential in reducing friction and preventing damage to internal components, providing many years of engine life. Engineered for sterndrive and outboard applications, this 4-stroke 25W-40 marine engine oil has been extensively tested to ensure impressive protection against corrosion and wear. Exceeds all marine industry 4-stroke oil requirements including FC-W and FC-W catalyst compatible.Formulated to protect against corrosion and excessive wearDesigned for use with all 4-stroke marine enginesOffers outstanding strength and viscosity retention1 gallon bottle25W-40 viscosityWARNING: Cancer and Reproductive Harm -www.P65Warnings.ca.gov