Engine Oil – Inboard Sterndrive

25W-40 4 Stroke Marine Stern Drive Engine Oil

Overview
25W-40 (4 cycle) oil has been formulated to provide excellent lubrication and corrosion protection. 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.

The benefits to your engine are 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. Guaranteed and backed by our famous Sierra comprehensive warranty. (Will not void your engine manufacturer’s warranty).

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25W-40 4 Cycle Synthetic Blend Engine Oil

Overview
This 4 cycle oil is blended with premium grade synthetic and mineral based stock combined with superior designed additives formulated for the stress endured by sterndrive and inboard engines.

• Superior corrosion protection.
• Advanced lubrication for reduction of wear to internal engine components.
• Outstanding friction reduction and wear protection.
• Removes thermal breakdown under high RPM’s, extreme temperatures and loads.
• Extensively tested for outstanding performance.

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SAE 30 Full Synthetic Marine Engine Oil

Overview
A special blend of synthetic base oil and a balanced additive system that exceeds the FC-W requirements for marine engine oil.

• Recommended for gasoline and diesel inboard and sterndrive engines.
• Superior engine protection during startups, operation and storage.
• Reduces friction and wear for extended engine life.
• Longer lubrication effectiveness than mineral oils.
• Reduces oil consumption and improves fuel economy.
• This oil meets “API SL/CF diesel specifications”.

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Synthetic Oil 10W30

Overview
Formulated specifically for 4-stroke outboard and sterndrive engine technology. A special blend of synthetic base oil and a balanced additive system that exceeds the FC-W requirements for marine engine oils.  Recommended for use in both outboard and sterndrive applications. Offers faster lubrication at start up in low temperatures, excellent protection at high temperatures, and greater resistance to oxidation for lower oil consumption.