Mercury – 10W-30 4-Stroke Synthetic Blend Marine Engine Oil | Engine Care | 1 Gallon | 8M0142151

Overview

When you run a boat you care about, you get to know every sound, every vibration, every little cue that tells you the engine is happy—or not. That is why the oil you choose matters so much. Mercury 10W-30 Synthetic Blend Marine Engine Oil 8M0142151 gives you that steady confidence every boater wants, the kind that settles in when you know your engine is protected no matter how hard you lean on it. Whether you spend most days trolling along quiet shorelines or pushing out into open water at high rpm, this oil is built to keep the heart of your boat running strong, cool, and clean.

Key Features

• Purpose-formulated to reduce wear, corrosion, and internal friction
• Synthetic blend construction designed for optimal protection in marine environments
• Holds strong viscosity under high heat and high load
• Recommended anywhere 10W-30 marine oil is called for
• One-gallon bottle for convenient full-system oil changes
• Designed to meet strict Mercury Marine original equipment standards
• Mercury Marine part number 8M0142151

Engine & Boat Compatibility

• Works with four-stroke outboards up to 150 horsepower
• Optimized for all Mercury 3.4L V6 and 4.6L V8 outboards
• Compatible with other marine four-stroke engines requiring 10W-30 oil
• Ideal for center consoles, fishing boats, pontoons, runabouts, and multipurpose family boats
• Suitable for both recreational and heavy-use commercial applications

Performance & Practical Benefits

What stands out most with this oil is how steady your engine feels under pressure. Even during long runs at wide-open throttle, the blend resists thinning and breakdown, keeping everything moving with that smooth, tight precision Mercury engines are known for. You will feel it when you throttle up—the response stays crisp, the engine tone stays clean, and the performance stays consistent as the hours build.

The corrosion protection is also something you will appreciate, especially if your boat sees saltwater or sits for stretches between outings. The additives fight moisture intrusion and protect internal surfaces, giving you a measure of security when the boat is on the trailer, on a lift, or tucked away for a cold stretch of weather. It is the kind of protection you do not really notice day to day, but you absolutely rely on when you want the engine to last for years.

Why Buy OEM

Choosing OEM oil is a simple decision when you think about it. Mercury designs its engines to run at high loads and high temperatures, and this oil is engineered around those exact demands. Aftermarket blends may check the boxes on paper, but they rarely deliver the same long-term consistency. With OEM oil, you get reliability, predictable performance, and the comfort of knowing you are treating your engine the way Mercury intended. It is the smarter long-term choice and a small investment compared to the cost of major repairs.

FAQ

Q1: Which engines does this oil fit?

It is recommended for all Mercury four-stroke outboards up to 150 horsepower, as well as Mercury 3.4L V6 and 4.6L V8 engines.

Q2: What makes this different from aftermarket marine oils?

The formula is engineered specifically around Mercury’s performance and durability requirements, offering superior wear protection and viscosity stability.

Q3: How do I know if this is the right oil for my setup?

Check your owner’s manual—if your engine calls for 10W-30 four-stroke marine oil, this is the correct choice.

Q4: Is it suitable for saltwater use?

Absolutely. The corrosion inhibitors are designed to protect engines in both saltwater and freshwater environments.

Q5: Is installation straightforward?

Yes. Most boat owners can handle a full oil change with standard tools and a little care.