Formulated specifically for 4-stroke outboard and sterndrive technology, Sierra 18-9690-3 synthetic oil is a special blend of synthetic base oil and a balanced additive system that exceeds FC-W requirements. It offers excellent protection at high temperatures and faster lubrication at start up in low temperatures.

• Formulated specifically for 4-stroke outboard and sterndrive engine technology
• Recommended for use in both outboard and sterndrive applications
• Greater resistance to oxidation for lower oil consumption
• NMMA FC-W Certified/API-SL