Synthetic Blend Cat Oil 25W-40 5 Quart | Sierra 18-9440CAT-4
Synthetic Blend Cat Oil 25W-40 5 Quart | Sierra 18-9440CAT-4
Sierra
164 in stock
Couldn't load pickup availability
Synthetic blend 25W-40 engine oil is formulated for stern drive & inboard marine engines with catalyst emission systems.
- Sierra synthetic blend catalyst inboard engine oil
- SAE 25W-40
- 5 quart jug
- Recommended for use with inboard and I/O marine engines with catalyst exhaust systems
- Meets the requirements of modern 4-stroke recreational inboard, I/O, and outboard engines with or without emission catalyst systems
- Developed specifically for the marine environment and the high running stresses marine engines encounter
- Protects internal engine components from rust and corrosion
- Features high detergency, antiwear proprties, and dispersants to prevent engine sludge
- ZDDP anti-wear additive prevents phosphorus depletion and extends the emission catalyst life
- NMMA FC-W certified/API-SL
- Replaces Mercury 92-8M0078630
! Compatibility references are provided for informational purposes only and do not constitute a fitment guarantee. Part numbers, application listings, and "replaces" cross-references are based on manufacturer data and are intended as a starting point for identification — not a guarantee of fit for your specific engine, hull, or installation.
Buyer is solely responsible for verifying compatibility with their engine model, serial number, model year, and trim configuration before purchase. If you are unsure whether this part fits your application, contact MacombMarineParts.com before you buy — we're available via text, email, or online chat to help verify compatibility for your specific application.
MacombMarineParts.com is not liable for parts ordered based on assumed fitment. Returns due to buyer-selected incorrect fitment are subject to our standard return and restocking fee policies.