--- product_id: 10122912 title: "Mercury 25W-40 4-Stroke Marine Engine Oil, 1 Gallon - 8M0078628" brand: "mercury" price: "R3492" currency: ZAR in_stock: true category: "Mercury" url: https://www.desertcart.co.za/products/10122912-mercury-25w-40-4-stroke-marine-engine-oil-1-gallon store_origin: ZA region: South Africa --- # Marine-grade corrosion defense Exceeds all marine warranty specs 25W-40 viscosity for peak engine performance Mercury 25W-40 4-Stroke Marine Engine Oil, 1 Gallon - 8M0078628 **Brand:** mercury **Price:** R3492 **Availability:** ✅ In Stock ## Summary > ⚓ Power your marine adventures with oil that never lets you down! ## Quick Answers - **What is this?** Mercury 25W-40 4-Stroke Marine Engine Oil, 1 Gallon - 8M0078628 by mercury - **How much does it cost?** R3492 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/10122912-mercury-25w-40-4-stroke-marine-engine-oil-1-gallon) ## Best For - mercury enthusiasts ## Why This Product - Trusted mercury brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Viscosity That Lasts:** Industry-leading viscosity retention keeps your engine running smoothly under extreme marine conditions without thinning out. - • **Certified & Warranty-Ready:** Meets and exceeds all marine engine manufacturer warranty requirements, including FC-W and FC-W Catalyst compatibility for peace of mind. - • **Unmatched Corrosion Shield:** Advanced additive package delivers superior protection against harsh saltwater and corrosive environments, extending engine life. - • **Trusted Legacy of Excellence:** Backed by decades of Mercury Marine’s engineering and testing expertise, ensuring premium quality and reliability every time. - • **Engineered for Marine Mastery:** Specifically formulated for Mercury, MerCruiser, and top 4-stroke marine engines to ensure flawless compatibility and performance. ## Overview Mercury 25W-40 4-Stroke Marine Engine Oil is a premium, OEM-spec lubricant designed for four-stroke outboard, sterndrive, and inboard engines. It offers superior wear and corrosion protection, industry-leading viscosity retention, and exceeds all marine warranty standards, including FC-W certification. Engineered by Mercury Marine, it ensures peak performance and extended engine life in the toughest marine environments. ## Description Marine engines operate in a harsh, corrosive environment that demands specialized protection you can't find in an automotive oil. Keep your engine operating at its peak with Mercury SAE 25W-40 4-Stroke Marine Engine Oil 8M0078628. In addition to superior strength and viscosity retention, it features a specialized additive package that helps prevent corrosion, on and off the water. This oil is recommended for use in all 4-stroke outboard, sterndrive and inboard engines, where 25W-40 is called for. It exceeds all marine industry requirements for 4-stroke oil and is certified FC-W and FC-W Catalyst Compatible. ## Features - For use in Mercury, MerCruiser and other leading brands of four-stroke outboard, sterndrive and inboard marine engines - Provides outstanding wear and corrosion protection to help extend engine life - Industry-leading strength and viscosity retention - Exceeds all marine engine manufacturer warranty requirements and recommendations and is certified FC-W and FC-W Catalyst Compatible - Produced by Mercury Marine to our stringent original equipment manufacturer specifications - Mercury oils, lubricants and engine care products are backed by decades of experience in engineering, testing and manufacturing to provide the best protection and performance. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00GWV9NHW | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #125,353 in Automotive ( See Top 100 in Automotive ) #727 in Motor Oils | | Brand Name | MERCURY | | Compatible with Vehicle Type | Marine Engines | | Container Type | Bottle | | Customer Reviews | 4.8 4.8 out of 5 stars (308) | | Flash Point | 400 °F | | Included Components | Engine Oil | | Item Weight | 16 ounces | | Liquid Volume | 1 gallons | | Manufacturer | Mercury Marine/Mercruiser | | Manufacturer Part Number | 8M0078628 | | Model Number | 8M0078628 | | Number of Packs | 1 | | Size | 1 gallon | | UPC | 745061915664 | | Unit Count | 128 Fluid Ounces | | Viscosity Level | Medium to High | ## Product Details - **Brand:** MERCURY - **Flash Point:** 400 °F - **Liquid Volume:** 1 gallons - **Package Information:** Bottle - **Vehicle Service Type:** Marine Engines ## Images ![Mercury 25W-40 4-Stroke Marine Engine Oil, 1 Gallon - 8M0078628 - Image 1](https://m.media-amazon.com/images/I/619UBB3cmhL.jpg) ## Frequently Bought Together - Mercury Lubricants 4-Stroke - Gallon - MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01 - Quicksilver 858064Q01 High Performance SAE 90 Gear Lube for Mercury Outboards and MerCruiser Sterndrives, 32 oz --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/10122912-mercury-25w-40-4-stroke-marine-engine-oil-1-gallon](https://www.desertcart.co.za/products/10122912-mercury-25w-40-4-stroke-marine-engine-oil-1-gallon) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-08-18*