25W-40 I/O-I/B PREMIUM 4-CYCLE ENGINE OIL (SIERRA)
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. 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.