Description
SIERRA 25W-40 Synthetic Blend Catalyst Marine Oil, 5 qt – 18-9440CAT-4 is the larger package of Sierra 25W-40 synthetic-blend catalyst oil for engines operating under sustained marine load and temperature.
It provides viscosity stability, corrosion protection, detergency and anti-wear performance while remaining suitable for catalyst-equipped marine engines.
Key Features
- SAE 25W-40 synthetic-blend marine oil
- Catalyst-compatible for modern four-stroke engines
- Resists excessive thinning under severe operating conditions
- Detergency helps control sludge and deposits
- Five-quart jug suits common inboard/sterndrive oil-change volumes
Specifications
- Manufacturer Part Number: 18-9440CAT-4
- Container: 5 US qt / 4.7 L
- Viscosity: SAE 25W-40
- Oil Type: Synthetic blend
- Performance: NMMA FC-W / API SL; catalyst compatible
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