Quicksilver DFI 2-Stroke Marine Outboard Oil, 1 Gallon — Direct-Injection Formula, Low-Smoke Wear Protection

Quicksilver DFI 2-Stroke Marine Outboard Engine Oil (1 gallon) is a purpose-built direct-injection oil formulated to protect and optimize DFI outboards from Mercury, Mariner and OptiMax engines.

This one-gallon container of Quicksilver DFI 2-Stroke Marine Outboard Engine Oil (part number 8M0229799) is engineered specifically for direct-injection (DI) two-stroke outboards. Quicksilver has supplied OEM-quality lubricants and parts to the marine industry for decades, and this oil is developed to meet the unique demands of high-pressure fuel-injected outboard combustion systems. It balances detergency, wear protection and low-smoke performance to help preserve engine internals and maintain reliable operation on the water.

How does this oil protect direct-injection outboard engines?

The formulation focuses on reducing wear and corrosion inside the engine’s high-stress moving parts while preventing deposit buildup in the combustion chamber. That helps extend service intervals and keeps mechanical tolerances within specification under marine operating conditions.

• Specifically blended for DFI fuel systems to avoid injector and pump deposits
• Enhanced lubricity to reduce scuffing and metal-to-metal wear
• Corrosion inhibitors shield internal surfaces from saltwater and moisture

Will this oil help with exhaust smoke and carbon deposits?

This Quicksilver oil is formulated to minimize visible exhaust smoke and to limit carbon accumulation that can rob power or foul spark plugs. Cleaner combustion chambers and exhaust paths support consistent performance and easier maintenance.

• Low-smoke formulation reduces visible emissions compared with non-DI oils
• Detergent additives help keep combustion chambers and ports cleaner
• Less carbon buildup means more stable idle and throttle response

Is this compatible with my Mercury/Mariner/OptiMax DFI engine?

Yes — the oil is recommended for use in Mercury, Mariner and OptiMax direct-injection two-stroke outboards. It meets the performance needs of those OEM systems and is supplied under the Quicksilver brand trusted by Mercury Marine as original-equipment lubricant solutions.

• Formulated for DI outboards; follows OEM guidance for DFI applications
• Sold under Quicksilver, the OEM supplier for Mercury Marine parts and oils
• Part number 8M0229799 aligns with factory service recommendations

How should I store and use this one-gallon container?

Store the closed container in a cool, dry place away from direct sunlight and ignition sources. Follow your engine manufacturer’s instructions for oil dosing with direct injection systems, and dispose of used oil and empty containers according to local regulations.

• Keep sealed until ready to use and avoid prolonged heat exposure
• Use OEM-recommended oil metering and mixing procedures for DI systems
• Recycle or dispose of oil containers through approved facilities

Who is this for? Boaters and marine technicians running direct-injection two-stroke outboards from Mercury, Mariner or OptiMax who want an OEM-grade lubricant that focuses on wear protection, reduced smoke and cleaner combustion. It’s ideal for those who prefer factory-recommended products and want to maintain peak engine reliability and longevity under typical saltwater and freshwater operating conditions.