Mercury Mercruiser 15W40 Diesel Oil 3.78L (858042K01)

The Mercury Mercruiser 15W40 Diesel Oil 3.78L delivers strong, consistent protection for hardworking marine diesel engines. Designed specifically for MerCruiser applications, it performs exceptionally well under pressure, helping your engine stay cleaner, smoother, and more efficient over time.

Built for Demanding Marine Use

Marine diesel engines operate under heavy loads, often for extended periods. That’s why this oil is formulated to handle the stress. The Mercury Mercruiser 15W40 Diesel Oil 3.78L includes high-quality detergents and dispersants that actively reduce piston deposits and prevent soot accumulation. As a result, it keeps engine internals clean and functioning efficiently.

Reliable Protection Against Wear and Corrosion

Salt, moisture, and heat constantly attack marine engines. Fortunately, this oil fights back. It creates a tough protective film over internal components, significantly reducing metal-on-metal contact and wear. Additionally, anti-corrosion agents work continuously to block rust and oxidation, even when the engine isn’t running.

High Thermal Stability for Consistent Performance

Even in extreme temperatures, this oil remains stable. It doesn’t break down under stress, ensuring a steady flow and dependable lubrication from startup to shutdown. Moreover, this stability supports smoother operation and helps extend engine life.

Smooth Operation. Fewer Repairs.

Because it keeps internal parts cleaner, this oil leads to smoother running and improved fuel efficiency. It helps prevent power loss caused by sludge and carbon buildup. So, whether you’re idling through a marina or cruising at full throttle offshore, your diesel engine stays reliable and strong.

Perfect for Inboards and Sterndrives

This oil is ideal for MerCruiser inboard and sterndrive diesel engines. It’s also compatible with other marine diesel engines that require similar specifications. Use it for everything from weekend boating to high-hour commercial applications.

Easy-to-Use 3.78L Bottle

The 3.78-litre container offers just the right amount for full oil changes or top-ups. The built-in handle and spill-resistant design make pouring quick and easy, even in tight engine spaces. Keep it handy on board or in your workshop for routine maintenance.

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