Description

Mercury 4-Stroke Marine Engine Oil – 1L – 8M0078639

Protect your marine engine with Mercury 4-Stroke Marine Engine Oil 8M0078639. This genuine Mercury OEM SAE 25W-40 marine engine oil is specially formulated for use in Mercury outboards, MerCruiser sterndrives, and other 4-stroke marine engines.

Unlike automotive oils, this marine-specific formula contains advanced additives designed to protect engines operating in high-load, high-RPM marine environments. It helps maintain lubrication, resist corrosion, and prevent thermal breakdown during demanding boating conditions.

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Key Features

• Genuine Mercury Marine OEM 4-stroke engine oil

• SAE 25W-40 viscosity grade

• Marine-specific additive package for corrosion protection

• Helps maintain viscosity under extreme heat and engine loads

• Reduces internal engine wear and friction

• FC-W and FC-W Catalyst Compatible certified

Mercury marine oil is engineered specifically for boat engines and provides stronger corrosion protection and viscosity stability than standard automotive oils.

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Part Details

OEM Part Number: 8M0078639
Mercury Reference Number: 92-8M0078639
Product Type: 4-stroke marine engine oil
Oil Type: Synthetic blend marine oil
Viscosity: SAE 25W-40
Container Size: 1 Liter (approx. 1.06 quarts)

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Compatible Mercury & MerCruiser Engines

Approved for use in most 4-stroke marine engines requiring 25W-40 oil, including:

Mercury FourStroke Outboards

• Mercury 2.5HP – 400HP FourStroke outboards

• Mercury Pro XS FourStroke models

• Mercury Verado FourStroke engines

MerCruiser Sterndrives & Inboards

• MerCruiser 3.0L

• MerCruiser 4.3L V6

• MerCruiser 5.0L V8

• MerCruiser 5.7L V8

• MerCruiser 6.2L V8

• MerCruiser 7.4L V8

• MerCruiser 8.2L V8

This oil is approved for outboard, sterndrive, and inboard marine engines where 25W-40 oil is specified.

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Function

Engine oil lubricates internal components such as pistons, crankshafts, and bearings while helping regulate engine temperature and reduce friction.

Using Mercury marine oil helps:

• Reduce internal engine wear

• Prevent corrosion from moisture and saltwater exposure

• Maintain engine cleanliness and lubrication

• Protect engines operating at high RPM and heavy loads

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Important Compatibility Note

Always confirm the recommended oil viscosity in your engine owner’s manual. While many Mercury and MerCruiser engines use 25W-40, some newer engines may require 10W-30 or 25W-50 depending on model and operating conditions.

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Shipping: Ships same or next day for fast Canada wide shipping.