Mercury 858027K01 – Premium Plus TC‑W3 2‑Stroke Synthetic Blend Marine Engine Oil, 1 Gallon

Versatile OEM 2-stroke oil for oil-injected, carbureted, and EFI marine engines – delivers premium wear protection and clean engine performance.

Product Overview

Mercury 858027K01 is a TC‑W3-certified Premium Plus 2‑stroke outboard oil, engineered for oil-injected, carbureted, or EFI 2-stroke engines in mid- to high-horsepower applications. Designed to reduce carbon buildup, enhance wear protection, and offer corrosion resistance in harsh marine environments.

This oil meets or exceeds all major 2-stroke marine engine manufacturer requirements and is ideal for routine use in both saltwater and freshwater conditions. Supplied in a 1-gallon (3.78 L) bottle.

Key Features

• Designed for 2-stroke oil-injected, carbureted & EFI engines
• TC-W3 certified for universal 2-stroke marine application
• Reduces carbon deposits for cleaner combustion and better performance
• Protects against wear and internal corrosion
• Meets or exceeds OEM warranty requirements for all TC-W3 applications
• Supplied in a 1-gallon (3.78 L) container

Engine Compatibility

• Mercury and Mariner 2-stroke outboards
• Oil-injected 2-stroke engines
• Carbureted and EFI mid- to high-horsepower engines
• Compatible with most other 2-stroke marine engines requiring TC-W3 oil
• Supersession: 802826A1