Mercury – Full Synthetic Marine Engine Oil | 10W-30 4-Stroke Formula | Premium Synthetic | 8M0173223

Overview

Every boater knows that feeling when you push the throttle forward and the engine answers with smooth, confident power. That kind of trust doesn’t happen by accident—it comes from taking care of the heart of your boat. Mercury 10W-30 Full Synthetic Marine Engine Oil (8M0173223) is the oil you reach for when you want absolute peace of mind, whether you’re cruising across open water or easing toward the dock after a long day. It’s Mercury’s toughest, most advanced formula, built for the kind of conditions only the water can create. When the heat climbs, the load increases, or the hours stack up, this oil keeps everything running steady and strong.

Key Features

• Formulated for non-catalyzed 4-stroke outboard, sterndrive, and inboard engines
• Full synthetic construction with elevated anti-wear, detergent, and dispersant additives
• High ZDDP levels for exceptional protection against wear, corrosion, and thermal stress
• Delivers the highest viscosity retention among Mercury 10W-30 full synthetic oils
• Compatible with mineral and synthetic blend 10W-30 oils for easy upgrading
• Manufactured to Mercury Marine original equipment specifications
• Designed for peak performance in a wide range of temperatures and operating conditions

Engine & Boat Compatibility

Ideal for use in:

• Non-catalyzed Mercury 4-stroke outboards
• Mercury sterndrive engines
• Mercury inboard engines
• Common applications include:
• Center consoles and bay boats
• Pontoon boats and runabouts
• Sport boats and cruisers
• Fishing boats running long hours at varying speeds

Performance & Practical Benefits

What sets this oil apart isn’t just what’s inside the bottle—it’s how it makes your engine feel on the water. Mercury’s full synthetic formula holds its viscosity incredibly well, even when you’re running in extreme heat or pushing through heavy chop. The engine stays smooth, responsive, and protected from the inside out.

The elevated zinc and phosphorous levels help create a tight, secure barrier on critical components, reducing wear during long runs and hard acceleration. The detergents and dispersants keep oil passages clean, preventing the sludge, varnish, and buildup that can rob a motor of its power. Even after hours of operation, the engine feels steady and strong, with consistent lubrication that doesn’t thin out under stress.

This oil resists corrosion better than most, making it a dependable choice for boats that spend their time battling saltwater or sitting idle between trips. Every part of the formula works to extend engine life while preserving the performance you count on.

Why Buy OEM

Choosing a Mercury Marine part is choosing reliability you can feel.

• Formulated precisely for Mercury engines—not a one-size-fits-all product
• Tested in real marine environments, from idle speeds to wide-open throttle
• Superior long-term value by reducing wear and maintenance issues
• Guaranteed compatibility and performance with Mercury engine components
• Backed by decades of engineering focused solely on marine applications

When it comes to protecting your engine, OEM isn’t just better—it’s smarter.

FAQ Section

Q1: Which engines does this oil fit?

It’s made for non-catalyzed four-stroke outboards, sterndrives, and inboards.

Q2: What makes it different from aftermarket oils?

Mercury’s formula provides unmatched viscosity retention, high ZDDP protection, and marine-specific corrosion resistance.

Q3: How do I know if it’s right for my setup?

If your engine requires 10W-30 and is non-catalyzed, this oil is the ideal OEM choice.

Q4: Can it be used in saltwater and freshwater?

Yes—it's engineered to protect in both environments.

Q5: Is it easy to switch from a blend to this full synthetic?

Absolutely. It’s fully compatible with mineral and synthetic blend 10W-30 oils.