Quicksilver – 80W-90 Premium Gear Lube | Outboards and Sterndrives | Marine Formula | 858059Q01

Overview

When you’re out on the water, peace of mind is everything. The last thing you want is to wonder whether your lower unit’s holding up under pressure. With Quicksilver 80W-90 Premium Gear Lube, you’ll never have to guess. It’s the gear oil you trust without thinking about it — reliable, proven, and built to keep things running smooth whether you’re idling through the marina or wide open down the channel.

Key Features

• Designed for outboard engines up to 75 horsepower
• 80W-90 viscosity for reliable lubrication in all temperatures
• Engineered to resist wear, corrosion, and gear pitting
• Contains improved emulsifiers for protection when water enters the gear housing
• Meets NMMA marine certification standards
• Packaged in a 2.5-gallon container for extended use

Engine & Boat Compatibility

• Ideal for Mercury, Mariner, and other compatible outboards under 75 HP
• Works with oil-injected and small sterndrive systems
• Commonly used on fishing boats, pontoons, and compact cruisers
• Built for freshwater and saltwater boating

Performance & Practical Benefits

There’s something satisfying about a quiet, well-lubricated gearcase — the way it shifts cleanly, the steady hum when you’re on plane. Quicksilver Premium Gear Lube gives you that feeling trip after trip. It’s been tested under punishing marine conditions to ensure the oil film stays intact, even when things heat up or water sneaks into the housing.

That’s where it truly earns its keep. The emulsifiers don’t just mix; they protect, keeping rust and pitting at bay until you can service the unit properly. The result is steady performance, fewer mechanical issues, and more time on the water without worry.

You’ll feel the smoothness, you’ll hear the difference, and you’ll know you made the right call.

Why Buy OEM

Real boaters stick with Quicksilver because it’s built by the same experts behind Mercury Marine. Every batch is tested in salt, spray, and sun — not just in a lab. When you buy OEM, you’re getting a product made for real marine life, not rebranded automotive oil.

It’s reliable, consistent, and proven. And when you’re miles from shore, that kind of confidence is priceless.

FAQ Section

Q1: Which engines use Quicksilver 80W-90 Gear Lube 858059Q01?

It’s made for Mercury, Mariner, and compatible 2-stroke or 4-stroke outboards under 75 horsepower.

Q2: What’s different from regular gear oil?

This marine-specific blend resists moisture damage and maintains film strength under load.

Q3: How do I verify compatibility?

Check your manual for part number 858059Q01 or 80W-90 marine lube recommendation.

Q4: Saltwater safe?

Yes — it’s built for both saltwater and freshwater.

Q5: Easy to handle?

The 2.5-gallon jug is easy to pour and perfect for long-term maintenance.