Sierra 25W-40 4-Stroke Synthetic Catalyst Marine Oil

Sierra 25W-40 4-Stroke Synthetic Catalyst-Compatible Marine Oil

This Sierra Synthetic Blend Engine Oil meets modern recreational 4-stroke engines with or without emission catalyst systems. 

Features:

• Minimizes corrosion that is formed inside the engine.
• Displays enhanced detergent properties to suspend and prevent engine sludge formation.
• Industry leading wear protection and deposit control.
• Prevents excessive thinning under extreme performance operations.
• Capitalizing on "ZDDP" anti-wear additive technology.
• Prevents phosphorous depletion and extends the emission catalyst life.
• NMMA FC-W Certified/API-SL

Interchangeable with:

• Mercury Marine
• 92-8M0078629

Frequently Asked Questions

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!

What is Sierra 25W-40 4-Stroke Synthetic Catalyst-Compatible Marine Oil used for?

Sierra 25W-40 4-Stroke Synthetic Catalyst-Compatible Marine Oil is a synthetic blend engine oil formulated for modern recreational 4-stroke engines with or without emission catalyst systems. It is designed to provide wear protection, corrosion protection, and deposit control during marine engine operation.

Is Sierra 25W-40 Marine Oil compatible with emission catalyst systems?

Yes. This Sierra synthetic blend engine oil is designed for modern recreational 4-stroke engines with or without emission catalyst systems. Its formulation is designed to help prevent phosphorus depletion and extend emission catalyst life.

What protection does Sierra 25W-40 Synthetic Marine Oil provide?

Sierra 25W-40 Marine Oil provides wear protection and deposit control while helping minimize corrosion inside the engine. Its enhanced detergent properties help suspend and prevent sludge formation, and its formulation helps prevent excessive oil thinning during extreme performance operations.

Does Sierra 25W-40 Marine Oil meet NMMA FC-W and API-SL requirements?

Yes. Sierra 25W-40 4-Stroke Synthetic Catalyst-Compatible Marine Oil is NMMA FC-W Certified and carries an API-SL rating.

What anti-wear technology does Sierra 25W-40 Marine Oil use?

Sierra 25W-40 Marine Oil uses ZDDP anti-wear additive technology. The product description identifies this technology as part of the formulation designed to provide wear protection during marine engine operation.

What marine oil does Sierra 25W-40 Synthetic Catalyst-Compatible Oil interchange with?

Sierra 25W-40 4-Stroke Synthetic Catalyst-Compatible Marine Oil is listed as interchangeable with Mercury Marine 92-8M0078629. Verify the oil requirements for your specific engine before use.

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