Name: 10W-30 4-Stroke Outboard Engine Oil NMMA FC-W Marine Motor Oil Yamaha Mercury
Brand: Westway Oils
Price: 15.94 GBP
Availability: InStock

10W-30 4-Stroke Outboard Engine Oil NMMA FC-W Marine Motor Oil Yamaha Mercury

Dispatched in 2-3 days

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Our stock levels are dynamic and can change frequently. If a product appears to be in stock, it may have already sold out. Please contact us if you have any questions about availability. Thank you for your understanding.

Size

20L

£15.94

Tax included.

10W-30 4-Stroke Outboard Engine Oil

NMMA FC-W Certified Performance

This premium 10W-30 4-stroke marine engine oil is engineered specifically to meet the harsh demands of the marine environment. Unlike standard automotive oils, this specialized formula contains advanced rust inhibitors and shear-stable additives designed to maintain viscosity under the high-load, high-RPM operation typical of outboard motors. It provides an industry-leading defense against saltwater atmospheric corrosion, even during long periods of storage.

RELIABILITY: Formulated to meet or exceed NMMA FC-W standards, ensuring complete protection for internal engine components in both saltwater and freshwater applications.

Key Features

✔ Excellent anti-wear characteristics
✔ Superior saltwater corrosion protection
✔ High shear stability for high RPM use
✔ Reduces engine deposits and sludge
✔ Improved cold starting performance

Technical Specs

Viscosity:	SAE 10W-30
Certification:	NMMA FC-W / FC-W (CAT)
API Ratings:	SM / SL / SJ / SG
Oil Type:	Semi-Synthetic Blend
Compatibility:	4-Stroke Outboards

Compatibility / Fitment Guide

Make/System	Model/Application	Notes
Yamaha	F-Series 4-Stroke Outboards	All models requiring 10W30
Mercury / Mariner	FourStroke / Verado	Except specific V10/V12 reqs
Honda Marine	BF-Series 4-Stroke	Fully Compatible
Suzuki Marine	DF-Series 4-Stroke	Compatible where 10W30 is specified
Tohatsu / Nissan	MFS-Series 4-Stroke	Meets all warranty requirements

OEM Cross Reference

Mercury / Quicksilver	92-8M0078625, 92-858045K01
Yamalube	LUB-10W30-FC-12, LUB-10W30-FC-04
Sierra	18-9420-2
Honda	08211-999-100

Questions & Answers

Is this a genuine original part?

This is a premium quality aftermarket replacement part, manufactured to meet or exceed original equipment (OE) standards for fitment and performance.

How do I know if it is compatible?

If your engine manual specifies 10W-30 FC-W certified oil, this product is compatible. We recommend checking the SKU/MPN and Cross Reference list provided above.

Can I use standard automotive 10W-30 in my boat?

No. Automotive oils do not contain the specialized anti-corrosion additives required for saltwater environments, nor are they designed for the sustained high-RPM operation of an outboard motor. Using non-marine oil may lead to accelerated wear or engine failure.

Note: Please verify your original part number and manufacturer requirements before purchasing. Domain: 4boats.co.uk

For the products under £150 the shipping is £6.99.

Free delivery for most items over £150.

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10W-30 4-Stroke Outboard Engine Oil NMMA FC-W Marine Motor Oil Yamaha Mercury