---
product_id: 75188598
title: "Quicksilver 25W-40 Synthetic Blend 4-Stroke Marine Engine Oil, 1 Gallon"
brand: "quicksilver"
price: "R4287"
currency: ZAR
in_stock: true
category: "Quicksilver"
url: https://www.desertcart.co.za/products/75188598-quicksilver-25w-40-synthetic-blend-4-stroke-marine-engine-oil
store_origin: ZA
region: South Africa
---

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

**Brand:** quicksilver
**Price:** R4287
**Availability:** ✅ In Stock

## Summary

> 🛥️ Power your marine adventures with Quicksilver’s ultimate 4-stroke engine shield!

## Quick Answers

- **What is this?** Quicksilver 25W-40 Synthetic Blend 4-Stroke Marine Engine Oil, 1 Gallon by quicksilver
- **How much does it cost?** R4287 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/75188598-quicksilver-25w-40-synthetic-blend-4-stroke-marine-engine-oil)

## 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

- • **Proven Reliability:** Rated #18 in Motor Oils with a 4.8-star average from 1,770+ marine pros.
- • **OEM Trusted Quality:** Direct replacement for Mercury Marine parts, backed by 65+ years of marine expertise.
- • **Marine-Grade Performance:** Precision synthetic blend tailored for sterndrive and outboard 4-stroke engines.
- • **Peak Viscosity Stability:** Industry-leading viscosity retention keeps your engine running smoothly under pressure.
- • **Unmatched Engine Longevity:** Advanced corrosion resistance ensures your engine stays pristine season after season.

## Overview

Quicksilver 25W-40 Synthetic Blend Marine Engine Oil is a premium, 1-gallon synthetic blend designed specifically for 4-stroke marine engines. It delivers superior corrosion resistance, wear protection, and viscosity stability to maintain peak engine performance in sterndrive and outboard motors. Trusted by Mercury Marine and rated highly by thousands of users, this oil ensures long-lasting engine health and reliability on the water.

## 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 4-stroke synthetic blend 25W-40 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 8M0078630
- Designed for use in 4-stroke marine engines
- Synthetic blend formulated to provide ultimate corrosion resistance and wear protection in high-rpm 4-stroke outboard motors
- Offers industry-leading strength and viscosity retention to maintain peak engine performance and reliability
- 25W-40 viscosity

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00FM9AVKI |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #501 in Automotive ( See Top 100 in Automotive ) #18 in Motor Oils |
| Brand Name | Quicksilver |
| Compatible with Vehicle Type | Boat |
| Container Type | Bottle |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,772) |
| Global Trade Identification Number | 00745061915572 |
| Included Components | End Product & Information |
| Item Highlight | For 4-Stroke Outboard, Inboard and Sterndrive Marine Engines |
| Item Type Name | Oil |
| Item Weight | 7 pounds |
| Liquid Volume | 3.79 liters |
| Manufacturer | Quicksilver |
| Manufacturer Part Number | 8M0078623 |
| Manufacturer Warranty Description | See Label |
| Model Number | 8M0078623 |
| Number of Packs | 1 |
| Size | 1 gallon |
| UPC | 745061915572 745061915824 |
| Unit Count | 128 Fluid Ounces |
| Viscosity Level | Medium to High |

## Product Details

- **Brand:** Quicksilver
- **Liquid Volume:** 3.79 liters
- **Package Information:** Bottle
- **UPC:** 745061915572 745061915824
- **Vehicle Service Type:** Boat

## Images

![Quicksilver 25W-40 Synthetic Blend 4-Stroke Marine Engine Oil, 1 Gallon - Image 1](https://m.media-amazon.com/images/I/61KFdPGIarL.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 858064Q01 High Performance SAE 90 Gear Lube for Mercury Outboards and MerCruiser Sterndrives, 32 oz

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**Shop now:** [https://www.desertcart.co.za/products/75188598-quicksilver-25w-40-synthetic-blend-4-stroke-marine-engine-oil](https://www.desertcart.co.za/products/75188598-quicksilver-25w-40-synthetic-blend-4-stroke-marine-engine-oil)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-10-01*