10W-30 4 cycle oil is a highly refined petroleum product formulated with premium base stock and highly refined additives. Specifically formulated to meet or exceed the tough requirements of the Marine 4-Stroke motor manufacturers, Mercury, Yamaha, Johnson-Evinrude, Suzuki and Honda.
• Excellent anti-wear characteristics.
• Reduces friction.
• Formulated to offer maximum corrosion protection.
• Reduces sludge keeps engine cleaner for better efficiency.
• Low temperature viscosity offers better cold starting.
• Meets and exceeds quality performance API SJ, CF-2, CH-4
• Guaranteed and backed by our famous Sierra comprehensive warranty. (Will not void your engine manufacturer’s warranty).