Sierra 25W-40 4-Stroke Conventional Marine Oil

Sierra Marine 25W-40 4-Stroke Conventional Marine Oil

25W-40 4 STROKE MARINE STERN DRIVE ENGINE 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 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. Recommended for Mercruiser and OMC.

• 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, and CH-4
• NMMA FC-W Certified

How much oil does my engine need?

It varies model to model, check out our Engine Oil Capacity Guide for more information and capacity charts!

Interchangeable with:

• Mallory
• 9-82380
• Mercury Marine
• 92-802837Q1

Frequently Asked Questions

What is Sierra Marine 25W-40 4-Stroke Conventional Marine Oil used for?

Sierra Marine 25W-40 4-Stroke Conventional Marine Oil is formulated for marine stern drive and inboard engines operating under high loads and running stresses. It provides lubrication along with wear and corrosion protection for internal engine components in marine applications.

Which marine engines is Sierra 25W-40 oil recommended for?

Sierra 25W-40 marine oil is recommended for Mercruiser and OMC stern drive and inboard engines. The product description does not specify individual engine models, years, or capacities, so verify your engine's requirements before use.

What protection does Sierra 25W-40 marine oil provide?

This 25W-40 conventional marine oil is formulated with detergency, antioxidants, antiwear, and corrosion protection properties. It is designed to help reduce internal component wear, protect internal parts from corrosion, keep pistons cleaner, and help prevent ring sticking.

What performance standards does Sierra Marine 25W-40 oil meet?

Sierra Marine 25W-40 4-Stroke Conventional Marine Oil meets or exceeds the quality performance requirements of API SJ, CF-4, and CH-4. It is also NMMA FC-W Certified for marine engine oil applications.

How much Sierra 25W-40 oil does my marine engine need?

Oil capacity varies by engine model. Check your engine specifications and the applicable owner’s manual to determine the correct oil quantity before servicing. The product description also references Wholesale Marine’s Engine Oil Capacity Guide for additional capacity information.

What products is Sierra Marine 25W-40 oil interchangeable with?

Sierra Marine 25W-40 4-Stroke Conventional Marine Oil is listed as interchangeable with Mallory part number 9-82380 and Mercury Marine part number 92-802837Q1. Verify the part number and engine requirements before selecting a replacement oil.

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