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18-9400-4

Sierra 25W-40 Premium Blend 4-Stroke Marine Engine Oil 4.73 L

Availability: Stock Qty: 5+
$129.49 (excluding GST)
Or, 4 easy payments of $37.23 (including GST) with Buy 18-9400-4 with Afterpay.
Details:
Product Group: Oil/Lube and Engine Care
Product Sub Group: Four Stroke Oils
Product brand: Sierra

Description:

25W-40 FC-W 4-Stroke Stern Drive Marine Oil – 5 Qt / 4.73L (18-9400-4)

Premium protection for high-load sterndrive and inboard engines.

This 25W-40 FC-W 4-Stroke Stern Drive Oil is engineered specifically for sterndrive and inboard engines that operate under heavy load, continuous running stress, and harsh marine environments. Formulated with premium base oils and a sophisticated additive package, it delivers excellent lubrication, enhanced detergency, and robust corrosion protection to keep engines running cleaner, cooler, and more efficiently.

Designed to outperform standard automotive 4-cycle oils, this marine-grade formulation reduces internal wear, prevents piston ring sticking, and maintains superior film strength even at low temperatures and during extended high-RPM operation. Certified to NMMA FC-W standards and meeting API SJ, CF-4, and CH-4 performance requirements, it provides reliable engine protection in both freshwater and saltwater conditions. Recommended for MerCruiser and OMC applications.

Key Features
- Formulated for excellent lubrication and corrosion protection
- Designed to handle high load and running stress in sterndrive and inboard engines
- Outperforms standard automotive 4-cycle oils in marine environments
- Superior detergency and oxidation resistance
- Reduces wear and protects critical internal components
- Helps maintain cleaner pistons and prevents ring sticking
- Excellent low-temperature performance
- Meets or exceeds API SJ, CF-4, CH-4 standards
- NMMA FC-W Certified
- Recommended for MerCruiser and OMC engines
- Bottle Size: 5 quarts (4.73 L)
- Shipping box quantity = 4

OEM Interchange
- Mallory: 9-82382
- Mercury Marine: 8M0078640, 92-857389A1

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