4-Stroke Engine Oil - SAE 25W-40

Stern drive and inboard engines operate under high load and running stresses. This product is developed for the marine environment and will out perform standard 4-cycle automotive engine oils. Sierra’s 25W-40 oil offers excellent detergency, anti-oxidants, antiwear, and corrosion protection.

• Reduced wear to the internal components
• Protection of internal parts from corrosion
• Cleaner pistons, and prevention of ring sticking
• Excellent low temperature operating properties
• Meets or exceeds quality performance API SJ, CF-4, CH-4
• Recommended for use in Mercruiser, OMC and Volvo Penta