Mercury – 10W-30 4-Stroke Synthetic Blend Marine Engine Oil | Engine Care | Synthetic Blend | 8M0142141

Overview

There is a certain peace that settles over you when you know your engine is protected, no matter what the day on the water brings. Whether you are pushing through a stiff headwind or just drifting quietly along a weedline, you want an oil that keeps everything running smooth and steady. Mercury 10W-30 4-Stroke Synthetic Blend Marine Engine Oil 8M0142141 is built for those long days when the hours stack up, the temperatures climb, and the engine never stops asking for more. It gives you that confidence every boater craves—the comfort of knowing your outboard will fire, run, and return without hesitation.

Key Features

• Formulated to protect four-stroke marine engines and outboards up to 150 horsepower
• Optimized for Mercury 3.4L V6 and 4.6L V8 engines where 10W-30 oil is specified
• Provides up to 33 percent greater camshaft wear protection than leading competitors
• Exceptional viscosity retention for high-temperature, high-rpm performance
• Advanced corrosion inhibitors exceed FC-W standards for lasting protection
• Mercury Marine part number 8M0142141
• One quart container for easy handling and storage

Engine & Boat Compatibility

• Recommended for Mercury 3.4L V6 and 4.6L V8 outboards
• Suitable for all four-stroke outboards up to 150 horsepower
• Ideal for center consoles, pontoons, aluminum fishing boats, runabouts, and small cruisers
• Also compatible with select inboard and sterndrive systems requiring 10W-30 marine oil

Performance & Practical Benefits

Anyone who has heard an engine strain on a hot day knows how important strong oil really is. This synthetic blend holds its viscosity even when you spend hours running at high rpm, keeping the engine feeling smooth and steady instead of thin or stressed. The wear protection is noticeable—everything sounds tighter, more controlled, more confident. You can feel the difference when throttling up onto plane or easing in and out of no-wake zones.

The corrosion inhibitors work quietly in the background, guarding internal components whether the engine is on the water, on the trailer, or sitting through the off-season. That little bit of added security goes a long way, especially for boaters who split time between saltwater and freshwater. The formula resists moisture intrusion, protects against internal rust, and helps extend engine life in ways you can see over time: fewer issues, cleaner oil changes, and parts that simply last longer.

Why Buy OEM

A marine engine faces conditions far tougher than anything on the highway. That is why using a genuine Mercury Marine oil matters. It is blended specifically for the heat, load, moisture, and vibration that define boating. With OEM oil, you know the formula matches the engine’s needs exactly—no guesswork, no risk, no wondering whether the additives are right. Over the long run, using the right oil saves money by protecting components, reducing wear, and keeping performance strong. It is the advice seasoned boaters share often: use the oil the engine was built for, and it will return the favor many times over.

FAQ

Q1: Which Mercury engines does this oil work with?

It is recommended for Mercury 3.4L V6 and 4.6L V8 outboards, along with all four-stroke outboards up to 150 horsepower requiring 10W-30 oil.

Q2: What sets this oil apart from aftermarket blends?

Stronger wear protection, superior viscosity retention, and corrosion resistance designed specifically for marine conditions.

Q3: How do I confirm it is the right oil for my engine?

Check your owner’s manual or confirm that your engine calls for 10W-30 four-stroke marine oil.

Q4: Can this oil be used in both freshwater and saltwater setups?

Yes—its advanced corrosion protection makes it ideal for either environment.

Q5: Is it easy to use for routine maintenance?

Absolutely. The one-quart bottle pours cleanly and is perfect for topping off or doing complete oil changes.