Mercury – Quicksilver 10W-30 4-Stroke Marine Engine Oil, 1 Gallon | Marine Engine Oil | Standard Finish | 8M0078617

Overview

There’s a certain comfort that comes from knowing your engine is protected by oil you trust. When you turn the key and hear that steady, easy rumble, you feel the whole day settling into place. Quicksilver 10W-30 4-Stroke Marine Engine Oil, part number 8M0078617, is the kind of oil seasoned boaters rely on because it keeps their engines calm, cool, and dependable. Whether you are creeping out of a quiet marina at dawn or opening up the throttle across open water, it gives you that reassuring sense that everything under the cowling is running just the way it should.

Key Features

• Designed for all four-stroke marine outboards, sterndrive engines, and inboards

• Formulated to reduce corrosion and protect internal surfaces from excessive wear

• Blended for strong shear resistance and stable viscosity under marine conditions

• Ten weight thirty viscosity

• One gallon bottle size

• Mercury Marine part number 8M0078617

Engine & Boat Compatibility

• Compatible with most Mercury four-stroke outboards across common horsepower ranges

• Suitable for Mercury sterndrives and inboards requiring 10W-30 oil

• Works with other major four-stroke marine engine brands

• Commonly used on pontoons, bass boats, offshore center consoles, runabouts, and small cruisers

Performance & Practical Benefits

Out on the water, the performance of your oil shows up in a hundred small but important ways. You feel it when your engine warms quickly and settles into a smooth idle. You feel it when you accelerate and the power comes on clean and confident, without hesitation or roughness. This 10W-30 blend is engineered to maintain a tight, steady film across fast-moving components, reducing friction so your engine runs cooler and lasts longer.

The corrosion protection is a real difference-maker. Marine engines face moisture, salt, temperature swings, and long periods of storage — conditions that can be hard on internal components. This oil forms a protective layer that helps those parts stay clean and stable, giving you fewer maintenance surprises over the years. The viscosity stays consistent even under the pressure of long high-rpm runs, which means your engine remains responsive and controlled. It is the kind of oil you notice only because everything feels right.

Why Buy OEM

Choosing a genuine Mercury Marine part is a smart decision for anyone who wants predictable, long-term reliability. OEM oil is designed to match the engineering of Mercury engines, from cold starts to heavy loads. Aftermarket oils often fall short when exposed to marine heat, moisture, and extended running. With Quicksilver, you get a product that has been tested in extreme conditions and proven to hold up season after season. It is cost-effective because it protects your engine, reduces wear, and saves you from buying parts you otherwise would not need. It is the advice any seasoned boater would share: stick with the oil that was built for your engine.

FAQ

Q1: Which Mercury engines does Quicksilver 10W-30 4-Stroke Marine Engine Oil fit?
It works with most Mercury four-stroke outboards, inboards, and sterndrives that require a ten weight thirty oil.

Q2: What makes this oil different from aftermarket versions?
It withstands marine heat, moisture, and high-rpm conditions better, offering stronger corrosion and wear protection.

Q3: How do I know if this oil is right for my setup?
Check your owner’s manual. If it calls for a ten weight thirty oil, this is the proper choice.

Q4: Can this oil be used in both saltwater and freshwater?
Yes, it is formulated for reliable performance in either environment.

Q5: Is installation straightforward for most boat owners?
Yes. If you can perform a routine oil change, you will find this oil easy to pour and work with.