---
product_id: 75188598
title: "Quicksilver 25W-40 Synthetic Blend - Gallon"
brand: "quicksilver"
price: "€ 121.58"
currency: EUR
in_stock: true
reviews_count: 13
category: "Quicksilver"
url: https://www.desertcart.hr/products/75188598-quicksilver-25w-40-synthetic-blend-gallon
store_origin: HR
region: Croatia
---

# 25W-40 viscosity for optimal engine flow Synthetic blend with superior corrosion & wear protection Specifically engineered for 4-stroke marine engines Quicksilver 25W-40 Synthetic Blend - Gallon

**Brand:** quicksilver
**Price:** € 121.58
**Availability:** ✅ In Stock

## Summary

> 🛥️ Keep your MerCruiser running like a dream—because your boat deserves the best!

## Quick Answers

- **What is this?** Quicksilver 25W-40 Synthetic Blend - Gallon by quicksilver
- **How much does it cost?** € 121.58 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/75188598-quicksilver-25w-40-synthetic-blend-gallon)

## 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

- • **Ready for the Waves:** 1-gallon bottle with 3.79L volume, perfect for serious boaters who demand premium maintenance without compromise.
- • **Viscosity You Can Trust:** 25W-40 viscosity maintains stable oil flow and strength, delivering consistent performance in varying marine conditions.
- • **Engine Longevity Booster:** Advanced synthetic blend fights corrosion and wear, extending your outboard motor’s lifespan even under high RPM stress.
- • **Marine-Grade Performance:** Direct OEM replacement for Mercury Marine 8M0078630 ensures perfect compatibility and peak engine health.
- • **Peak Power & Reliability:** Formulated to meet Mercury Marine OEM specs, guaranteeing your engine runs smoother, longer, and more efficiently.

## Overview

Quicksilver 25W-40 Synthetic Blend Marine Engine Oil is a premium, OEM-approved lubricant designed specifically for 4-stroke marine engines. This synthetic blend offers superior corrosion resistance and wear protection, maintaining optimal viscosity and engine performance under high RPM conditions. Packaged in a convenient 1-gallon bottle, it ensures your outboard motor stays reliable and powerful on every voyage.

## Description

Buy Quicksilver 25W-40 4-Stroke Synthetic Blend Marine Engine Oil, 1 Gallon: Motor Oils - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: OEM stuff at a great price! - OEM stuff at a great price! Keeps my MerCruiser happy.
Review: Price increase - Great product but in 2 days the price went from $41 to$49. When price drops I’ll buy more

## 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
- Produced to meet Mercury Marine original equipment manufacturer specifications to best protect your outboard
- Manufacturer part number 8M0078623

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00FM9AVKI |
| Best Sellers Rank | #666 in Automotive ( See Top 100 in Automotive ) #21 in Motor Oils |
| Brand Name | Quicksilver |
| Compatible with Vehicle Type | Boat |
| Container Type | Bottle |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,676) |
| Global Trade Identification Number | 00745061915572 |
| Included Components | End Product & Information |
| Item Type Name | Oil |
| Item Weight | 7 Pounds |
| Liquid Volume | 3.79 Liters |
| Manufacturer | Quicksilver |
| Manufacturer Part Number | 8M0078623 |
| UPC | 745061915572 745061915824 |
| Unit Count | 128.0 Fluid Ounces |
| Viscosity | 25w-40 |

## Product Details

- **Brand:** Quicksilver
- **Liquid Volume:** 3.79 Liters
- **Package Information:** Bottle
- **Vehicle Service Type:** Boat
- **Viscosity:** 25w-40

## Images

![Quicksilver 25W-40 Synthetic Blend - 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

## Customer Reviews

### ⭐⭐⭐⭐⭐ OEM stuff at a great price!
*by A***S on December 23, 2025*

OEM stuff at a great price! Keeps my MerCruiser happy.

### ⭐⭐⭐⭐⭐ Price increase
*by C***N on September 4, 2025*

Great product but in 2 days the price went from $41 to$49. When price drops I’ll buy more

### ⭐⭐⭐⭐⭐ Good price
*by P***S on November 27, 2025*

Work in my engine and good price

## 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.hr/products/75188598-quicksilver-25w-40-synthetic-blend-gallon](https://www.desertcart.hr/products/75188598-quicksilver-25w-40-synthetic-blend-gallon)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-05-19*