Mercury – Quicksilver 10W-40 Full Synthetic Motorcycle Oil | Motorcycle Oil | Full Synthetic | 8M0058915

Overview

There’s a familiar calm that settles in when you know your engine is protected — not just on the days you’re riding hard, but on the ones when the bike sits waiting for the next open stretch of road. Motorcycles live a different kind of life: high revs, tight tolerances, and bursts of heat that test every inch of the engine. That’s why the oil you choose matters so much. Quicksilver 10W-40 Full Synthetic Motorcycle Oil gives you that steady confidence, the kind that makes you trust your machine whether you’re carving through a sweeping backroad or easing out of the driveway before sunrise.

Key Features

• Full synthetic 10W-40 formula designed for four-stroke motorcycle and scooter engines
• Strong film protection to resist shear and oxidation under high heat
• Additives shield internal parts from corrosion and wear
• Flows quickly in cold temperatures for smoother starts and instant protection
• JASO certified and meets major powersports manufacturer warranty requirements
• One-quart bottle
• Mercury Marine part number 8M0058915

Engine & Boat Compatibility

• Suitable for most four-stroke motorcycle engines, including modern fuel-injected designs
• Works in scooters, sport bikes, touring bikes, adventure models, and street machines
• Designed to handle high rpm operation, extended heat cycles, and long intervals between rides
• Compatible with engines that require a stable 10W-40 full synthetic oil

Performance & Practical Benefits

The real difference with this oil becomes obvious the moment the engine warms up. You’ll feel a smoother, steadier rhythm — the kind that comes from strong lubrication and a clean, balanced flow of moving parts. High heat doesn’t intimidate this formula. Even during long rides or heavy traffic where temperatures climb, the oil maintains its integrity. It resists thinning, clings tightly to metal surfaces, and keeps the engine operating with the same confident tone you heard when you first rolled out.

Cold mornings tell another part of the story. Instead of a sluggish crank or that strained first burst of revs, the oil moves instantly — protecting parts that would otherwise grind through a dry start. Over time, that quick flow makes a real difference in how the engine ages. Less wear, fewer deposits, and more consistency from one ride to the next.

This oil also helps maintain crisp performance. Throttle response stays tight, shifting feels cleaner, and the engine holds its power instead of softening after long intervals. Whether you ride daily or only when the weather calls you, the engine feels ready every time you thumb the starter.

Why Buy OEM

Mercury Marine parts have earned their reputation through relentless testing and real-world performance. This oil isn’t a generic blend — it’s formulated for engines that live under stress and see heat that would punish ordinary oils. When you use an OEM product, you’re choosing reliability you can measure over years, not miles. It protects the engine the way the manufacturer intended, and that reliability translates into fewer repairs, fewer surprises, and a machine that feels right every time you ride.

FAQ

Q1: Which Mercury engines or systems does this oil fit?

It’s designed for four-stroke motorcycle and scooter engines of various makes and models.

Q2: What makes this motorcycle oil different from aftermarket versions?

It offers stronger heat resistance, better film strength, and the kind of reliability that comes from Mercury-level testing.

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

If your manual calls for a full synthetic 10W-40 oil, this is a safe, high-quality match.

Q4: Can this be used in saltwater or freshwater environments?

This oil is intended for land-based engines, but it handles humid or coastal conditions without issue.

Q5: Is installation straightforward for most owners?

Absolutely — drain the old oil, replace the filter if needed, and fill to your manufacturer’s recommended level.