Quicksilver 25W-40 4-Stroke Conventional Marine Oil

Quicksilver 25W-40 4-Stroke Conventional Inboard & Sterndrive Marine Oil

Formulated for the demands of 4-stroke marine engines, Quicksilver 25W-40 oil provides dependable protection in both freshwater and saltwater conditions. It resists breakdown in high heat, guards against corrosion, and helps prevent wear, especially during off-season storage. Whether you’re idling at the dock or running wide open, this oil maintains stable viscosity and protects vital components from damage. It also fights deposit buildup to keep your engine cleaner over time. Designed specifically for marine use, it's a trusted pick for extending engine life and ensuring smoother starts when boating season kicks off. A favorite among marine techs for a reason.

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!

Benefits of Using Quicksilver 25W-40 Marine Oil

• Multi-viscosity 25W-40 oil formulated to eliminate thermal breakdown under extreme temperatures and loads without the need for viscosity improving additives.
• Field-tested and proven in gas and diesel engine trials.
• Lubricates and protects internal engine components from corrosion, wear scuffing, and scoring - even under higher temperatures.
• Warranted protection for Mercury MerCruiser engines.

Quicksilver Engine Oil Sizes Available

• 8M0078619 Quart
• 8M0078620 Gallon

Wholesale Marine’s selection of quality Mercury outboard parts includes Quicksilver 25w 40 Marine Engine Oil, which is recommended for use in all 4-stroke Marine Engines. 

946 ml (32 fl oz) plastic bottle.

Frequently Asked Questions

What is Quicksilver 25W-40 4-Stroke Conventional Inboard & Sterndrive Marine Oil used for?

Quicksilver 25W-40 4-Stroke Conventional Inboard & Sterndrive Marine Oil is formulated for 4-stroke marine engines and provides protection in freshwater and saltwater conditions. It helps protect internal engine components from corrosion, wear, scuffing, and scoring while resisting breakdown under high temperatures and loads.

What type of marine engines can use Quicksilver 25W-40 oil?

Quicksilver 25W-40 marine oil is recommended in the product description for use in 4-stroke marine engines and is specifically described as providing warranted protection for Mercury MerCruiser engines. Verify the oil requirements for your specific engine before use.

How does Quicksilver 25W-40 Marine Oil protect an engine?

This multi-viscosity 25W-40 oil lubricates and protects internal engine components from corrosion, wear, scuffing, and scoring. It is formulated to resist thermal breakdown under extreme temperatures and loads and also helps fight deposit buildup.

Can Quicksilver 25W-40 Marine Oil be used in freshwater and saltwater conditions?

Yes. The product description states that Quicksilver 25W-40 oil provides protection in both freshwater and saltwater conditions. It is formulated to help guard marine engine components against corrosion and wear.

What sizes of Quicksilver 25W-40 Marine Oil are available?

The listed sizes are a quart with part number 8M0078619 and a gallon with part number 8M0078620. The quart is supplied in a 946 ml (32 fl oz) plastic bottle.

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

Oil capacity varies by engine model. Check the oil capacity information for your specific marine engine before performing an oil change to determine the required amount.

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