---
product_id: 6910470
title: "International 18-9400-4 25W-40 FC-W 4-Stroke Marine Stern Drive Oil - 5 Quart"
brand: "sierra"
price: "¥33299"
currency: JPY
in_stock: true
category: "Sierra"
url: https://www.desertcart.jp/products/6910470-international-18-9400-4-25w-40-fc-w-4-stroke
store_origin: JP
region: Japan
---

# 25W-40 viscosity for versatile performance Excellent low-temp flow for cold starts NMMA FC-W certified marine-grade protection International 18-9400-4 25W-40 FC-W 4-Stroke Marine Stern Drive Oil - 5 Quart

**Brand:** sierra
**Price:** ¥33299
**Availability:** ✅ In Stock

## Summary

> 🛥️ Keep your marine engine running smooth—don’t let your boat miss out!

## Quick Answers

- **What is this?** International 18-9400-4 25W-40 FC-W 4-Stroke Marine Stern Drive Oil - 5 Quart by sierra
- **How much does it cost?** ¥33299 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/6910470-international-18-9400-4-25w-40-fc-w-4-stroke)

## Best For

- sierra enthusiasts

## Why This Product

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

## Key Features

- • **Trusted & Tested:** Backed by NMMA FC-W certification and glowing 4.9-star user reviews
- • **Cold Start Confidence:** Superior low-temperature properties ensure smooth startups in any weather
- • **Universal Compatibility:** Perfect fit for Mercruiser, OMC, and off-road motorcycles—one oil to rule them all
- • **Corrosion & Wear Defense:** Advanced anti-corrosion and anti-wear additives extend engine life
- • **Marine-Grade Lubrication:** Engineered to outperform standard automotive oils under high marine loads

## Overview

Sierra International 25W-40 FC-W 4-Stroke Marine Stern Drive Oil is a premium blend designed specifically for stern drive and inboard marine engines. It delivers superior lubrication, corrosion protection, and excellent low-temperature performance. Certified NMMA FC-W and compatible with Mercruiser and OMC engines, this 5-quart oil bottle ensures your marine engine operates reliably under high stress and varying conditions.

## Description

Sierra 25W-40 FC-W 4-Stroke Stern Drive Oil is formulated to provide superior lubrication and corrosion protection. Stern drive and inboard engines operate under high load and running stresses, so Sierra developed their oil for the marine environment and will outperform standard 4-cycle automotive engine oils. Sierra oils offer strong detergency, anti-oxidants, antiwear, corrosion protection and reduced wear to the internal components. Excellent low temperature operating properties. NMMA FC-W Certified, recommended for use in Mercruiser and OMC.

## Features

- 25w-40 premium blend
- formulated to provide excellent lubrication and corrosion protection
- excellent low temperature operating properties
- meets or exceeds quality performance api sj, cf-4, and ch-4; nmma fc-w certified
- recommended for use in mercuries and omc
- Compatible with vehicle type: off-road-motorcycles
- Fit type: Universal
- Oem equivalent part number: MERCURY MARINE 92-857389A1

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000ZN43G4 |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #775,535 in Automotive ( See Top 100 in Automotive ) #2,081 in Motor Oils |
| Brand | Sierra |
| Brand Name | Sierra |
| Compatible with Vehicle Type | Off-Road Motorcycle |
| Container Type | Bottle |
| Customer Reviews | 4.9 out of 5 stars 59 Reviews |
| Global Trade Identification Number | 00808282105044 |
| Included Components | 25W40 Oil - 5 Qt |
| Item Type Name | 25W40 Oil - 5 Qt |
| Item Weight | 7.37 Pounds |
| Liquid Volume | 160 Fluid Ounces |
| Manufacturer | Sierra International |
| Manufacturer Part Number | SR18.9400.4 |
| Manufacturer Warranty Description | Limited Warranty |
| Model Number | SR18.9400.4 |
| Package Information | Bottle |
| Size | 5 L / 1.32 G |
| UPC | 808282105044 |
| Unit Count | 1.0 Count |
| Vehicle Service Type | Off-Road Motorcycle |
| Viscosity Level | Medium to High |

## Images

![International 18-9400-4 25W-40 FC-W 4-Stroke Marine Stern Drive Oil - 5 Quart - Image 1](https://m.media-amazon.com/images/I/61QXMStTZBL.jpg)

---

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**Shop now:** [https://www.desertcart.jp/products/6910470-international-18-9400-4-25w-40-fc-w-4-stroke](https://www.desertcart.jp/products/6910470-international-18-9400-4-25w-40-fc-w-4-stroke)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-09-25*