Specifically formulated and developed to meet the needs of: All 4-stroke outboard engines. – Developed for the rigors of the marine environment. – Industry-leading corrosion protection. – Features premium-grade synthetic and mineral-based stocks with specially designed marine grade additives not required in automotive oils. – Outstanding lubricity for internal engine components to reduce wear, scuffing and scoring. – Excellent running quality and long-term reliability. – Rigorously tested to guarantee warranty protection for Mercury and Mariner 4- Stroke outboards.