Description
SIERRA 25W-40 Catalyst-Compatible 4-Stroke Marine Oil, 1 qt – 18-9400CAT-2
SIERRA 25W-40 Catalyst-Compatible 4-Stroke Marine Oil, 1 qt – 18-9400CAT-2 is a catalyst-compatible premium-blend marine engine oil formulated for modern four-stroke engines with or without exhaust-emission catalysts.
The marine additive package emphasizes corrosion protection, deposit control and wear protection while controlling phosphorus depletion to support catalyst life.
Key Features
- SAE 25W-40 viscosity for marine four-stroke engines
- Compatible with engines equipped with emission catalysts
- Meets FC-W and FC-W Cat-compatible requirements
- ZDDP anti-wear chemistry supports component protection
- Marine corrosion and deposit-control additives for severe service
Specifications
- Manufacturer Part Number: 18-9400CAT-2
- Container: 1 US qt / 946 mL
- Viscosity: SAE 25W-40
- Engine Cycle: 4-stroke
- Certification: NMMA FC-W; FC-W Cat compatible
Interchange / Cross Reference
- Mercury Marine 92-8M0078627
- Mercury Marine 92-8M0078629
- Bel-Ray 99730-BT1

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