Synthetic Blend Inboard Engine Oil Quart 25W-40 | Sierra 18-9440-2
Synthetic Blend Inboard Engine Oil Quart 25W-40 | Sierra 18-9440-2
Sierra
13 in stock
Couldn't load pickup availability
Synthetic blend 25W-40 engine oil is formulated for stern drive & inboard marine engines.
- Sierra synthetic blend inboard engine oil
- SAE 25W-40
- 1 quart bottle
- Recommended for gasoline inboard and I/O engines
- 4-stroke oil is a blend of premium grade synthetic and mineral based stock with highly refined additives
- Developed specifically for the marine environment and the high running stresses marine engines encounter
- Protects internal engine components from rust, corrosion, and from sticking piston rings
- Features high detergency, anti-oxidants, and antiwear proprties
- Prevents thermal breakdown under high RPM's, extreme temperatures, and high load conditions
- NMMA FC-W certified/API-SL
- Replaces Mercury 92-8M0078629
! 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.