Sierra Full Synthetic 4-Cycle Marine Engine Oil

Sierra Full Synthetic 4-Cycle Marine Engine Oil is a 30-weight synthetic marine engine oil (also sold as 4-stroke marine motor oil). It is made for gasoline and diesel inboard and sterndrive engines. It combines a special blend of synthetic base oil with a balanced additive system that exceeds FC-W requirements for marine engine oil.

Key Features:

• Full synthetic SAE 30 formula for 4-cycle marine engines
• Exceeds FC-W requirements for marine engine oil
• API CF/SL service rating
• Recommended for gasoline and diesel inboard and sterndrive engines
• Protects the engine during startup, operation and storage
• Reduces friction and wear to help extend engine life
• Lasts longer than mineral oils
• Reduces oil consumption and improves fuel economy
• Backed by Sierra's Limited Lifetime Warranty

Sierra designed this oil for the high running stresses of the marine environment. It gives boat owners dependable lubrication and wear protection in every variant of the line.