Sierra's 4-Stroke 25W-40 Marine Engine Oil out performs automotive oils in the marine environment.Formulated to provided excellent lubrication and corrosion protection. Developed for the marine environment and outperforms automotive engine oils with excellent detergency, anti-oxidants, anti-wear and corrosion protection. This results in reduced internal component wear and corrosion, cleaner pistons and prevention of ring sticking. Excellent low temperature operating properties. Meets or exceeds quality performance API SJ CF-4 CH-4 and is NMMA FC-W certified. Recommended for use in Mercruiser and OMC sterndrives. SAE 25W-40.Key FeaturesExcellent detergency and anti-oxidants provide anti-wear and corrosion protectionHelps to keep pistons and internal components cleanExcellent low temperature operating propertiesRecommended for use in Mercruiser and OMC sterndrivesSAE 25W-40