# 928M0078630 Mercury MerCruiser 4 Stroke Marine engine oil 25W40 | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Mercury 25W-40 FourStroke Marine Engine Oil - Part Number: 92-8M0078630

  

Genuine Mercury / Quicksilver 25W-40 FourStroke marine engine oil formulated for Mercury, Mariner and MerCruiser four-stroke petrol engines. This marine-grade oil is designed for high-load marine operation, corrosion resistance and sustained RPM use in outboards, sterndrives and inboards where 25W-40 is specified.

  

⚙️ Key Features

  

• Genuine Mercury / Quicksilver marine engine oil

• Correct Mercury part number 92-8M0078630

• Listing reference: 928M0078630

• SAE 25W-40 FourStroke marine oil

• Formulated for four-stroke marine engines

• Suitable for Mercury FourStroke outboards and MerCruiser petrol engines where specified

• Designed for marine corrosion and high-load protection

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 92-8M0078630 current Mercury 25W-40 FourStroke marine oil reference

• 8M0078630 short-form container reference

  

OEM / Related Numbers:

  

• 92-8M0078630

• 8M0078630

• 928M0078630

• Mercury 25W-40 FourStroke oil

• Quicksilver 25W-40 marine oil

• FourStroke marine engine oil

• FC-W 25W-40 marine oil

• 92-8M0078014 related 25W-50 high-performance oil

• 92-8M0142151 related 10W-30 FourStroke oil

  

Aftermarket / Verified Equivalents:

  

• FC-W certified 25W-40 marine four-stroke oil equivalents where permitted by the engine service chart

• Marine synthetic-blend 25W-40 equivalents may be used only when they meet the required specification

• Use Mercury / Quicksilver 25W-40 where Mercury specifies it for warranty and service protection

• Do not substitute automotive oil for marine FC-W service applications

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury FourStroke outboards

• Mariner FourStroke outboards

• MerCruiser petrol sterndrive engines

• MerCruiser petrol inboard engines

• Annual and 100-hour oil service

  

Typically suits:

  

• Engine models:

• Mercury 25HP to 150HP FourStroke outboards where 25W-40 is specified

• Mercury 175HP to 300HP FourStroke outboards where specified

• Mercury Verado applications where the service chart lists 25W-40

• Mercury SeaPro FourStroke applications where specified

• Mercury Pro XS FourStroke applications where specified

• MerCruiser 3.0L, 4.3L, 5.0L, 5.7L, 350 MAG, 6.2L, 8.1L and 8.2L petrol engines where 25W-40 marine oil is specified

• MerCruiser MPI, carburetted and EC petrol engine service charts calling for 25W-40

  

• Engine Type: Mercury / Mariner FourStroke outboard and MerCruiser petrol engine

• System Type: Engine lubrication oil

• Oil Grade: SAE 25W-40 marine engine oil

  

🔌 Function

  

The oil lubricates internal engine components, helps manage heat, reduces wear and supports corrosion protection in marine environments.

  

Common service use:

  

• Scheduled engine oil changes

• Seasonal service

• 100-hour maintenance

• Oil top-up with matching grade

• Service after oil contamination

• Use where the engine service chart specifies 25W-40

  

📦 Condition

  

• Genuine Mercury / Quicksilver oil

• Brand new

• Supplied sealed in original container

## Details

- **Price:** 88.4 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 88.40 AUD | In stock |

## Images

- 928M0078630 Mercury MerCruiser 4 Stroke Marine engine oil 25W40 | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/928m0078630-mercury-mercruiser-4-stroke-marine-engine-oil-25w40-genuine-quicksilver-oem-part)
> Updated: 2026-07-18