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18-9440-4

Sierra 25W-40 Semi-Synthetic 4-Stroke Marine Engine Oil 4.73 L

Availability: Stock Qty: 5+
$101.58 (excluding GST)
Or, 4 easy payments of $29.20 (including GST) with Buy 18-9440-4 with Afterpay.
Details:
Product Group: Oil/Lube and Engine Care
Product Sub Group: Four Stroke Oils
Product brand: Sierra
Product fitment brand: Mercury / MerCruiser

Description:

25W-40 FC-W Synthetic Blend Marine Oil – 5 Qt / 4.73 L (18-9440-4)

High-performance synthetic blend engineered for sterndrive and inboard engines.

This premium 25W-40 FC-W Synthetic Blend Marine Oil is formulated from a high-quality combination of synthetic and mineral base stocks, delivering exceptional protection and durability for sterndrive and inboard 4-cycle engines. Enhanced with advanced additive technology, it is specifically engineered to withstand the extreme stress, high RPMs, elevated temperatures, and heavy loads typical in marine powerplants.

Its superior lubrication properties help reduce internal wear, minimize friction, and protect critical components, even under demanding operating conditions. This oil also provides outstanding corrosion resistance and thermal stability, preventing viscosity breakdown and ensuring consistent performance over long periods of operation. Fully certified to NMMA FC-W standards and meeting API-SL requirements, it is tested extensively to ensure reliability in both freshwater and saltwater environments.

Key Features
- Premium synthetic/mineral blend engineered for modern 4-cycle marine engines
- Advanced additive package designed for high-stress sterndrive and inboard applications
- Superior corrosion protection and long-term durability
- Reduces wear and friction for cleaner, more efficient engine performance
- Resists thermal breakdown at high RPMs, extreme temperatures, and heavy loads
- NMMA FC-W Certified / API-SL compliant
- Shipping box quantity = 4

OEM Interchange
Replaces:
- Mercury Marine: 8M0078630, 92-883725K01
- Mallory: 9-82392

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