Description

Mercury 8M0230194 is a genuine OEM 2-cycle DFI synthetic blend outboard oil for direct fuel injected Mercury and Mariner 2-stroke engines. Dealer listings identify this part number as the 4-litre package, and Mercury’s official DFI oil description says it is formulated for OptiMax and other DFI 2-cycle engines where reduced oiling rates and higher operating temperatures place greater demands on lubrication.

Key Features

• Genuine Mercury Marine / Quicksilver OEM oil
• Part number 8M0230194
• 4-litre container
• Synthetic blend formula for DFI / OptiMax 2-cycle outboards
• Designed to provide strong wear and corrosion protection, reduce smoke, and help minimize carbon deposits.

Engine Compatibility
This oil is recommended for Mercury and Mariner OptiMax and direct fuel injected (DFI) 2-cycle outboards. Dealer listings also note it is not intended for engines that specify TC-W3 oil, so exact oil specification should always be confirmed by the engine model and owner’s manual before use.

Serial Number Fitment Notice
Please confirm the correct oil specification by your exact engine model and serial number in the Mercury Parts Catalog or owner’s manual before purchase. Mercury’s catalog is the safest way to verify the correct lubricant for the application.

When This Part Needs Replacement
Use this oil during routine oil tank refill and regular service on applicable DFI 2-stroke outboards. Fresh OEM DFI oil helps support injector cleanliness, reduced deposits, proper lubrication, and long-term engine protection under high-heat operating conditions.

Installation Notes
Use only in engines that call for Mercury/Quicksilver DFI / OptiMax synthetic blend 2-cycle oil. Do not substitute it for applications that specifically call for a different 2-stroke oil standard.

Alternate / Superseded Part Numbers
No confirmed superseded part number was established from the sources reviewed for this exact 4-litre listing. The exact package number consistently shown is 8M0230194.

Parts Desk Insight
DFI oils are more specialized than general 2-stroke oils because OptiMax and other direct-injection engines run with lower oiling rates and higher thermal demand. Using the correct Mercury DFI blend helps keep carbon buildup under control while protecting injectors and internal engine parts.

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