Mercury 25W-40 4-Stroke Conventional Marine Oil

Mercury 25W-40 4-Stroke Conventional Marine Oil

Maintain peak engine performance and reliability with Mercury 25W-40 Marine Engine Oil. This oil outperforms automotive oils in marine applications because of its specialized additive package designed for marine engines. Mercury engine oils provide outstanding wear and corrosion protection to extend engine life. This oil also eliminates thermal breakdown under extreme rpm, temperature, and loads. Use with Mercury oil filters for better performance, reliability, and trouble-free operation.

This oil will not damage emissions systems and can be used in any marine engine equipped with or without a catalytic converter. Exceeds oil requirements and FC-W Catalyst Compatible qualifications for all marine engines.

Benefits of using OEM Mercury Engine Oil

• For use in 4-cycle outboard, sterndrive, and inboard engines
• Superior corrosion protection
• Most recommended OEM marine engine oil
• Use of this oil will not voice manufacturer warranties

Sizes Available:

• Quart
• Gallon

Special Order Mercury Marine Information:

• Additional Handling Time: Item transfers from an alternate warehouse requires an additional 1–3 business days to ship.
• Non Returnable: This item is ordered specifically for your application and cannot be returned or canceled once processed.
• Verify Fitment Before Ordering: Please confirm compatibility with your engine model.

Frequently Asked Questions

How much oil does my engine need?

It varies model to model, check out our Mercury and MerCruiser oil capacity guides for more information and capacity charts!

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

Mercury 25W-40 4-Stroke Conventional Marine Oil is formulated for 4-cycle marine engines, including outboard, sterndrive, and inboard engines. Its specialized marine additive package provides wear and corrosion protection while helping maintain engine performance and reliability under demanding marine operating conditions.

Can Mercury 25W-40 Marine Oil be used in engines with catalytic converters?

Yes. The product description states that Mercury 25W-40 Marine Oil can be used in marine engines equipped with or without a catalytic converter and will not damage emissions systems. It also exceeds FC-W Catalyst Compatible qualifications for all marine engines.

How does Mercury 25W-40 Marine Oil protect a marine engine?

Mercury 25W-40 provides wear and corrosion protection while helping eliminate thermal breakdown under extreme RPM, temperatures, and loads. Its specialized additive package is designed specifically for marine applications and helps support engine life and reliability.

What types of marine engines can use Mercury 25W-40 4-Stroke Oil?

Mercury 25W-40 4-Stroke Conventional Marine Oil is listed for use in 4-cycle outboard, sterndrive, and inboard engines. Verify the oil specification recommended for your specific engine before use.

Is Mercury 25W-40 Marine Oil available in different sizes?

Yes. Mercury 25W-40 4-Stroke Conventional Marine Oil is available in both quart and gallon sizes, allowing you to select the package size appropriate for your maintenance needs.

Can Mercury 25W-40 Marine Oil affect my manufacturer's warranty?

The product description states that use of this Mercury marine engine oil will not void manufacturer warranties. It also recommends using Mercury oil filters with the oil for better performance, reliability, and trouble-free operation.

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