Sierra's Synthetic Blend oil formulated for the stress endured by outboard engines.

• Sierra synthetic blend outboard engine oil
• SAE 25W-40
• 4 liter jug
• 4-stroke oil is a blend of premium grade synthetic and mineral based stock with highly refined additives
• Developed specifically for the marine environment and the high running stresses marine engines encounter
• Advanced lubrication protects internal engine components from rust, corrosion, and from sticking piston rings
• Minimized piston ring deposits
• NMMA FC-W certified/API-SL