# 92858038K01 Mercury MerCruiser Oil 9.46L Optimax | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Mercury OptiMax / DFI 2-Stroke Outboard Oil 9.46L - Part Number: 92-858038K01

  

Genuine Mercury OptiMax / DFI 2-cycle outboard oil in a 9.46 litre container. This synthetic-blend oil is designed for Mercury and Mariner direct fuel injected and OptiMax two-stroke outboards, offering high-load lubrication, carbon control and wear protection for DFI engine operation.

  

⚙️ Key Features

  

• Genuine Mercury / Quicksilver OptiMax DFI oil

• Correct Mercury part number 92-858038K01

• 9.46 litre / 2.5 US gallon container

• Synthetic-blend 2-cycle outboard oil

• Formulated for OptiMax and DFI direct-injection engines

• Larger container size for regular service or multi-engine use

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 92-858038K01 current 9.46L OptiMax / DFI oil reference

• 92-858038Q01 earlier / related 9.46L packaged reference where applicable

  

OEM / Related Numbers:

  

• 92-858038K01

• 858038K01

• 92858038K01

• 92-858038Q01

• OptiMax / DFI 2-cycle outboard oil

• Mercury DFI oil 9.46L

• Mercury OptiMax oil 2.5 gallon

• 92-858037K01 related 3.78L container

  

Aftermarket / Verified Equivalents:

  

• Sierra TC-W3 direct-injection synthetic-blend equivalents are available where an approved direct-injection 2-stroke oil is acceptable

• Use Mercury OptiMax / DFI oil where Mercury specifies it for warranty and service protection

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury OptiMax two-stroke outboards

• Mercury DFI two-stroke outboards

• Mariner OptiMax / DFI two-stroke outboards

• Direct-injected two-cycle outboards requiring OptiMax / DFI oil

  

Typically suits:

  

• Engine models:

• Mercury 75 DFI / OptiMax applications where OptiMax / DFI oil is specified

• Mercury 90 DFI / OptiMax applications where specified

• Mercury 115 DFI / OptiMax applications where specified

• Mercury 125 DFI / OptiMax applications where specified

• Mercury 135 DFI / OptiMax applications where specified

• Mercury 150 DFI / OptiMax applications where specified

• Mercury 175 DFI / OptiMax applications where specified

• Mercury 200 DFI / OptiMax applications where specified

• Mercury 225 DFI / OptiMax applications where specified

• Mercury 250 DFI / OptiMax applications where specified

• Mercury 300 DFI / OptiMax applications where specified

• Mercury 200XS / 225XS / 250XS / 300XS direct-injection performance applications where OptiMax / DFI oil is specified

• Mariner DFI / OptiMax two-stroke outboards where OptiMax / DFI oil is specified

  

• HP Range: commonly 75HP - 300HP DFI / OptiMax where specified

• Engine Type: Mercury / Mariner DFI and OptiMax two-stroke outboard

• System Type: Two-stroke oil injection / DFI lubrication

• Container Size: 9.46L

  

🔌 Function

  

The oil lubricates internal two-stroke engine components and supports clean direct-injection combustion. It helps reduce carbon deposits, protect against piston scuffing and maintain performance in high-output DFI applications.

  

Common service use:

  

• Routine oil top-up for OptiMax / DFI engines

• Oil tank refill after service

• Multi-engine maintenance

• Stocking larger container size for workshop or frequent use

• Replacement when incorrect oil has been used

  

📦 Condition

  

• Genuine Mercury / Quicksilver oil

• Brand new

• Supplied in sealed 9.46L container

## Details

- **Price:** 208.15 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 208.15 AUD | In stock |

## Images

- 92858038K01 Mercury MerCruiser Oil 9.46L Optimax | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/92858038k01-mercury-mercruiser-oil-9-46l-optimax-genuine-quicksilver-oem-part)
> Updated: 2026-07-18