Quicksilver Performance DFI 2-Stroke Synthetic Blend Oil 4L 8M0230195

Quicksilver Performance DFI 2-Stroke Synthetic Blend Oil — 4L — 8M0230195

Compatible Applications

Quicksilver formulated 8M0230195 specifically for direct fuel injection (DFI) 2-stroke engines operating at higher temperatures and reduced oiling rates. Always confirm the correct oil specification in your engine owner’s manual before use.

• Mercury OptiMax 2-stroke outboards (all horsepower ratings using DFI oil)
• Mariner OptiMax 2-stroke outboards
• Mercury / Mariner direct fuel injected (DFI) 2-cycle outboards where DFI oil is specified
• Gasoline direct-injection marine engines where the owner’s manual calls for an equivalent DFI lubricant

Not for use in: engines specifying conventional TC-W3 oil (Premium or Premium Plus), 4-stroke crankcase oil, gear lubricant, or any other lubricant category. Not intended for manual gasoline premix use.

Quicksilver vs. Mercury DFI Oil — What’s the Difference?

Both Quicksilver and Mercury branded DFI oils use the same underlying formulation — the difference is branding only. 858037QC1 was the previous Quicksilver-branded 4L reference; 8M0230195 is its direct replacement. The related Mercury-branded equivalent is Mercury OptiMax DFI Synthetic Blend 2-Stroke Oil 4L — 8M0230194.

Superseded / Cross-Reference Part Numbers

The following numbers are related or earlier Quicksilver / Mercury DFI oil references. Always verify container size when cross-referencing.

• 8M0230195 (primary — Quicksilver 4L)
• 92-8M0230195 (Quicksilver catalog format)
• 858037QC1 / 92-858037QC1 (superseded Quicksilver 4L reference — replaced by 8M0230195)
• 858037KC1 / 92-858037KC1 (related Mercury-branded reference)
• 857489A01 / 92-857489A01 (earlier DFI oil reference)
• 8M0061418
• 8M0229796
• 8M0229798
• 8M0229799
• 8M0230194 (current Mercury-branded 4L equivalent — same formulation, different brand label)

When to Use This Oil

• Routine refilling of the OptiMax or DFI engine oil reservoir
• Scheduled 2-stroke lubrication service on a compatible engine
• Replenishment after oil-system maintenance or component replacement
• Any time the engine’s oil reservoir requires top-up between service intervals

Application Notes

• Confirm the engine specifies OptiMax / DFI oil before filling — do not substitute TC-W3 oil
• Add directly to the engine-mounted or remote oil reservoir as designed
• Keep the reservoir cap and fill area clean to prevent contamination
• Do not mix with incompatible lubricant types in the reservoir
• Follow Mercury procedures for oil-system priming or bleeding after maintenance or when the system has been emptied
• Do not use as a gasoline premix oil

Other Package Sizes

• Mercury OptiMax DFI Synthetic Blend 2-Stroke Oil 4L — 8M0230194 (Mercury-branded equivalent)
• Quicksilver DFI 2-Stroke Marine Engine Oil, 208L Drum – 8M0229803

Related Products

• Mercury High Performance 2-Stroke Oil 8M0078011
• Mercury Premium Plus TC-W3 2-Stroke Oil 1 Litre 858026KC1
• Mercury Premium TC-W3 2-Stroke Oil 1 Litre 858021KC1

Parts Desk Insights

This is the Quicksilver-branded version of Mercury’s DFI oil — same formulation, different label. If you’ve been ordering 858037QC1, this is the direct replacement. The 4L bottle is the right size for most OptiMax owners servicing their own oil reservoir, with enough left over for top-ups. The most important thing to confirm before ordering is that your engine actually calls for DFI oil — if the reservoir cap or owner’s manual says “OptiMax Oil” or “DFI Oil,” this is your product. Using standard TC-W3 oil in a DFI system is one of the more common mistakes we see: it meets the TC-W3 standard, but it isn’t engineered for the higher heat and lower oiling rates inside a direct-injection engine, which can lead to deposit buildup and accelerated wear over time.