Mercury – Premium Plus 2-Stroke Marine Engine Oil | Synthetic Blend | 858025K01

Overview

If you have spent enough time on the water, you know that trust in your engine isn’t built overnight, it’s earned. Mercury’s Premium Plus 2-Stroke Marine Engine Oil is the kind of product that quietly earns that trust every time you turn the key. It’s for the boater who knows what it feels like to run wide open across glassy water, who’s felt the tug of the tide and the hum of a motor that just works. This oil doesn’t just protect your engine, it gives you that calm confidence that comes from knowing your boat’s ready for whatever the day brings.

Key Features

• Formulated for oil-injected, carbureted, or electronic fuel injected (EFI) 2-stroke engines.
• Synthetic blend design for powerful protection and cleaner performance.
• Meets NMMA TC-W3 certification for marine applications.
• Helps prevent carbon buildup and spark plug fouling.
• Delivers superior corrosion resistance even in high-moisture environments.
• Packaged in a 16-ounce bottle for easy onboard storage and maintenance.

Engine & Boat Compatibility

• Designed for mid- to high-horsepower Mercury 2-stroke outboards
• Compatible with oil-injected and premix systems
• Works with personal watercraft and other TC-W3-rated engines
• Perfect for fishing boats, center consoles, pontoons, and small cruisers

Performance & Practical Benefits

Ask any seasoned boater — engine oil isn’t just oil. It is the lifeblood of every trip. Mercury’s Premium Plus keeps things running tight and steady, even when you’re pushing hard against current or hauling a full load. The formula clings to moving parts, creating a smooth, protective film that resists friction and heat. You’ll notice fewer vibrations, cleaner exhaust, and more consistent power through every throttle push.

Even after long runs at full throttle, the engine stays cleaner inside — less carbon buildup, fewer fouled plugs, and a smoother idle when you ease back into the marina. It’s the kind of difference you can feel, not just see. You’ll spend less time worrying about maintenance and more time focusing on what matters — the feel of the wheel, the wind on your face, and the satisfaction of knowing your setup is dialed in right.

Why Buy OEM

When it comes to something as vital as your engine, shortcuts don’t belong on board. This genuine Mercury Marine part was designed by the same engineers who built your motor — tested in salt, sand, and spray to make sure it holds up when it counts. Aftermarket blends can talk big, but few match the precision and protection you get from OEM oil.

Using Mercury’s Premium Plus isn’t just about following the book; it’s about smart, long-term ownership. It keeps your motor cleaner, lasts longer between services, and helps you avoid those “what-if” breakdowns that ruin good days on the water. Real boaters know — OEM just fits better, runs smoother, and lets you get back to what you love.

FAQ Section

Q1: Which Mercury engines or systems does the Premium Plus 2-Stroke Oil fit?

It’s formulated for oil-injected, carbureted, and EFI 2-stroke Mercury outboards, typically in the mid- to high-horsepower range.

Q2: What makes this part different from aftermarket alternatives?

Mercury’s formula is engineered for marine performance — it resists water intrusion, reduces carbon buildup, and maintains lubrication even under full-throttle loads.

Q3: How do I know if this is the correct replacement for my setup?

If your manual calls for Mercury Marine part number 858025K01 or specifies TC-W3 oil, this is the right choice.

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

Yes — it’s built for both. The corrosion inhibitors perform exceptionally well in harsh saltwater conditions.

Q5: Is installation straightforward for most boat owners?

Absolutely. Just follow your owner’s manual for proper oil-injection or premix ratios, and you’ll be ready to go.