Description:
25W-40 FC-W Synthetic Blend Catalyst Marine Oil – 5 Qt / 4.73L (18-9440CAT-4)
Advanced catalyst-safe protection for modern 4-stroke marine engines.
This premium 25W-40 FC-W Synthetic Blend Catalyst Oil is engineered to meet the demands of modern 4-stroke outboard, sterndrive, and inboard engines—both with and without emission catalyst systems. Utilizing advanced ZDDP anti-wear additive technology, it delivers exceptional corrosion resistance, superior wear protection, and outstanding deposit control for extended engine life.
Formulated to prevent phosphorus depletion, this oil helps protect and extend the service life of emission catalyst components while maintaining reliable lubrication under extreme temperature and high-load operation. Certified to NMMA FC-W and compliant with API-SL standards, it provides consistent, high-performance protection in harsh marine environments.
Key Features
- Compatible with modern 4-stroke marine engines with or without emission catalyst systems
- Outstanding corrosion protection for internal engine components
- Industry-leading wear protection and deposit control
- Formulated to resist viscosity breakdown during extreme performance operation
- Utilizes advanced ZDDP anti-wear additive technology
- Prevents phosphorus depletion to extend catalyst life
- NMMA FC-W Certified / API-SL compliant
- Shipping box quantity = 4
OEM Interchange
Replaces Mercury: 92-8M0078629, 8M0078622