Mercury – 10W-30 Mineral Base Oil | Four-Stroke Engine Oil | 92-8M0078626

Overview

This 10W-30 mineral oil is a straightforward option for anyone running a four-stroke marine engine. It gives the motor the basic protection it needs—good wear control, solid corrosion resistance—and it holds up well through long days on the water. Most folks use it for routine oil changes when they just want something dependable without overthinking it. It comes in a one-gallon jug, which is usually enough for a standard service on most outboards.

Key Features

 • Mineral Base Formula – A simple, reliable oil blend for four-stroke marine engines.
 • SAE 10W-30 Weight – Good cold-start flow with steady protection at operating temperature.
 • Wear & Corrosion Protection – Helps internal parts stay clean and last longer.
 • Strong Viscosity Retention – Holds its body through long runs and warm conditions.
 • OEM-Level Production – Built to Mercury’s own manufacturer specifications.

Engine & Boat Compatibility

 • Four-stroke marine engines
 • Outboard oil systems
 • Sterndrive four-stroke engines
 • OEM-recommended 10W-30 oil applications

Performance & Practical Benefits

A fresh oil change with this blend usually makes the engine settle into a smoother idle and keeps the temperature more predictable during longer runs. It doesn’t thin out quickly, so the motor holds that “steady and relaxed” feel even after an hour or two on plane. It’s also good at fighting off the moisture and corrosion that tend to build up in marine engines, especially ones that sit for stretches between trips.

Why Buy OEM

Mercury designs this oil around the way their engines operate—heat cycles, load changes, moisture, and the kind of fuel most boaters run today. It’s tested to meet every requirement Mercury sets for their own motors, so you’re not guessing whether it’s compatible. With OEM oil, the engine behaves the way it was designed to.

FAQ

Q1: How do I know it’s time for an oil change?
Dark color, burnt smell, or hitting your service-hour interval are all good signs it’s due.

Q2: Do I need additives with this oil?
No—this blend already provides the protection marine four-strokes need.

Q3: How does it handle saltwater use?
It includes corrosion protection aimed specifically at salt and moisture exposure.

Q4: Any tips before changing the oil?
Warm the engine a bit first—warm oil drains cleaner and carries more debris with it.

Q5: What happens if the oil starts to break down?
You might feel rougher idle, slower throttle response, or see temps creep up—all signs to change it.