# 90790-BZ445-BT Yamalube 10W30 1L Outboard | Genuine OEM Yamaha Outboard Part

🔧 Product Description

  

Genuine Yamalube 4C 10W-30 Four-Stroke Outboard Oil 1L - Part Number: 90790-BZ445-BT

  

Genuine Yamalube mineral-based four-stroke marine engine oil supplied in a one-litre container.

  

The 10W-30 FC-W formulation is engineered for Yamaha outboard operating conditions, including sustained high engine speed, moisture exposure and long periods between use.

  

⚙️ Key Features

  

• Genuine Yamalube OEM four-stroke engine oil

• Correct Yamaha part number 90790-BZ445-BT

• SAE 10W-30 viscosity grade

• NMMA FC-W marine specification

• Supplied in a one-litre bottle

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 90790-BZ445-BT current one-litre Yamalube 10W-30 package reference

  

OEM / Related Numbers:

  

• 90790-BZ445-BT

• Yamalube 4C 10W-30

• One-litre four-stroke outboard oil

• 90790-BZ446-BT related four-litre package

  

Aftermarket / Verified Equivalents:

  

• NMMA FC-W 10W-30 marine engine oil meeting Yamaha's required specification

• Quicksilver 10W-30 four-stroke marine oil

• Sierra 10W-30 FC-W marine engine oil

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha four-stroke outboard engines

• Oil-level top-ups and scheduled engine-oil changes

  

Typically suits:

  

• Engine types:

• Yamaha F2.5 through F25 portable four-strokes

• Yamaha F30 through F70 mid-range four-strokes

• Yamaha F75 through F130 inline-four engines

• Yamaha F150 through F200 four-strokes

• Yamaha V6 and VMAX SHO engines where SAE 10W-30 is approved

• Yamaha high-thrust four-stroke outboards

  

• Product Type: Mineral marine four-stroke engine oil

• Viscosity: SAE 10W-30

• Container Size: 1 litre

• Specification: NMMA FC-W.

  

🔌 Function

  

The oil lubricates and protects the engine's crankshaft, pistons, camshafts, bearings and valve train.

  

Common signs replacement or topping-up is required:

  

• Oil level is below the dipstick mark

• Oil is dark or contaminated

• Low oil-pressure warning activates

• Engine noise increases

• Scheduled maintenance interval has been reached

  

📦 Condition

  

• Genuine Yamaha product

• Brand new

• Supplied in original packaging

## Details

- **Price:** 19.0 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 19.00 AUD | In stock |

## Images

- 90790-BZ445-BT Yamalube 10W30 1L Outboard | Genuine OEM Yamaha Outboard Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/90790-bz445-bt-yamalube-10w30-1l-outboard)
> Updated: 2026-07-11