Description
SIERRA 10W-40 Full Synthetic Marine Engine Oil, 1 gal – 18-9559CAT-3 is the gallon-size version of Sierra full-synthetic 10W-40 oil for high-output Volvo Penta inboard engines.
It is intended for year-round service and provides wear protection across both high and low operating temperatures in marine engine duty.
Key Features
- SAE 10W-40 full-synthetic marine oil
- Designed for high-performance Volvo Penta inboards
- Year-round operating range
- Maintains protective film under high-temperature load
- One-gallon package for higher-capacity service
Specifications
- Manufacturer Part Number: 18-9559CAT-3
- Container: 1 US gal / 3.78 L
- Viscosity: SAE 10W-40
- Oil Type: Full synthetic
- Application: High-performance Volvo Penta inboard engines
Verify the engine model and Volvo Penta oil specification before use.


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