---
product_id: 18858215
title: "25W-40 4-Stroke Marine Engine Oil for Outboards, 1 Gallon"
brand: "quicksilver"
price: "R3630"
currency: ZAR
in_stock: true
category: "Quicksilver"
url: https://www.desertcart.co.za/products/18858215-25w-40-4-stroke-marine-engine-oil-for-outboards-1
store_origin: ZA
region: South Africa
---

# 25W-40 viscosity for optimal engine flow Superior corrosion & wear protection Specifically engineered for 4-stroke marine engines 25W-40 4-Stroke Marine Engine Oil for Outboards, 1 Gallon

**Brand:** quicksilver
**Price:** R3630
**Availability:** ✅ In Stock

## Summary

> 🛥️ Power your marine adventures with Quicksilver — where performance meets peace of mind!

## Quick Answers

- **What is this?** 25W-40 4-Stroke Marine Engine Oil for Outboards, 1 Gallon by quicksilver
- **How much does it cost?** R3630 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/18858215-25w-40-4-stroke-marine-engine-oil-for-outboards-1)

## Best For

- quicksilver enthusiasts

## Why This Product

- Trusted quicksilver brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted Legacy Brand:** Backed by 65+ years of marine industry leadership, Quicksilver guarantees quality and reliability you can count on.
- • **Optimized High-RPM Flow:** Special viscosity modifiers maintain smooth lubrication at high RPMs, maximizing power and responsiveness.
- • **Engineered for Endurance:** Formulated to combat corrosion and wear, extending your marine engine’s lifespan even in harsh saltwater conditions.
- • **Industry-Approved Excellence:** Exceeds all marine 4-stroke oil standards including FC-W and catalyst compatibility for worry-free performance.
- • **Precision Marine Performance:** Direct replacement for Mercury Marine OEM oil ensures seamless compatibility and peak engine efficiency.

## Overview

Quicksilver 25W-40 4-Stroke Marine Engine Oil is a premium, OEM-approved lubricant designed specifically for 4-stroke outboard and sterndrive engines. It delivers superior corrosion resistance and wear protection, optimized viscosity for high-RPM performance, and meets all marine industry standards including FC-W. Trusted by professionals for over 65 years, this 1-gallon oil ensures your marine engine runs smoother, longer, and stronger.

## Description

Clean oil is essential in reducing friction and preventing damage to internal components, providing many years of engine life. Engineered for sterndrive and outboard applications, this 25W-40 4-stroke marine engine oil has been extensively tested to ensure impressive protection against corrosion and wear. Exceeds all marine industry 4-stroke oil requirements including FC-W and FC-W catalyst compatible. The Quicksilver brand is the leader in delivering uncompromising engine oils, parts and accessories to the marine industry for over 65 years. Quicksilver is the premier supplier of Mercury Marine original equipment replacement engine parts, oils, and accessories, but also works to serve all original equipment brands in the marine and powersports industries. It has earned a loyal following by providing the highest quality products that are tested through some of the most rigorous environments and testing procedures. No aftermarket company comes close to the level of research and design as Quicksilver; buying Quicksilver is buying performance, protection and peace of mind.

## Features

- Direct replacement for Mercury Marine 8M0078628
- Designed for use in 4-stroke marine engines
- Formulated to provide superior corrosion resistance and wear protection to maintain peak engine performance and reliability
- Special viscosity modifiers help to optimize the performance of high-rpm 4-stroke outboard motors
- 25W-40 viscosity

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00N6DF8SW |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #763 in Automotive ( See Top 100 in Automotive ) #18 in Motor Oils |
| Brand Name | Quicksilver |
| Compatible with Vehicle Type | Marine Vehicles |
| Container Type | Bottle |
| Customer Reviews | 4.8 4.8 out of 5 stars (2,803) |
| Global Trade Identification Number | 00745061915527 |
| Included Components | End Product & Information |
| Item Highlight | Formulated for Reliable Marine Engine Performance |
| Item Type Name | 25W-40 Oil |
| Item Weight | 7 pounds |
| Liquid Volume | 128 fluid ounces |
| Manufacturer | Quicksilver |
| Manufacturer Part Number | 8M0078620 |
| Model Number | 8M0078620 |
| Number of Packs | 1 |
| Size | 1 gallon |
| UPC | 745061915787 745061915527 |
| Unit Count | 128 Fluid Ounces |
| Viscosity Level | Medium to High |

## Product Details

- **Brand:** Quicksilver
- **Liquid Volume:** 128 fluid ounces
- **Package Information:** Bottle
- **UPC:** 745061915787 745061915527
- **Vehicle Service Type:** Marine Vehicles

## Images

![25W-40 4-Stroke Marine Engine Oil for Outboards, 1 Gallon - Image 1](https://m.media-amazon.com/images/I/61DkqhBDE5L.jpg)

## Available Options

This product comes in different **Pattern, Size, Style** options.

## Questions & Answers

**Q: is this oil full synthetic**
A: This product is a mineral based oil. “ The NEW mineral 4-Stroke oil is also now approved for use in all outboard engines; previously only our syntetic blend could make this claim”
Quicksilver makes a synthetic and it states synthetic on its lable.

**Q: What's the difference between mercury oil**
A: It is the same as Mercury oil.  Quicksilver is the Mercury lubricant brand and has been for years.

**Q: Is this for 01 bayliner Ccapri 4 cilinder**
A: If it has mercruiser motor.

**Q: How do I know if motor is 2 or 4 stroke? Basic Mercury 125 pontoon motor**
A: Look on the engine and your book if you got one.  It will tell you if 2 or 4 stroke

## Frequently Bought Together

- Quicksilver by Mercury Marine 25W-40 Marine Engine Oil
- Quicksilver 866340Q03 Oil Filter for MerCruiser Sterndrive and Inboard Engines
- Quicksilver 802893Q01 Water Separating Fuel Filter for Mercury and Mariner Outboards and MerCruiser Stern Drive and Inboard Engines

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**Shop now:** [https://www.desertcart.co.za/products/18858215-25w-40-4-stroke-marine-engine-oil-for-outboards-1](https://www.desertcart.co.za/products/18858215-25w-40-4-stroke-marine-engine-oil-for-outboards-1)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-09-13*