Premium Blend Catalyst Engine Oil Quart 10W-30 | Sierra 18-9420CAT-2
Premium Blend Catalyst Engine Oil Quart 10W-30 | Sierra 18-9420CAT-2
Sierra
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Sierra Quart 10W-30 Premium Blend Catalyst Engine Oil | 18-9420CAT-2
- Quart 10W-30 Premium Blend Catalyst Engine Oil
- NMMA FC-W Catalyst compatible oil has been specifically designed to meet the unique requirements of modern 4-stroke recreational engines with or without emission catalyst systems
- Approved for all 4-stroke applications including outboard, stern drive and inboard and exceeds all 4-stroke requirements including FC-W and FC-W Cat compatible
- Provides superior corrosion protection under extreme conditions
- Industry leading wear protection and deposit control
- Capitalizing on ZDDP anti-wear additive technology to prevent phosphorus depletion and extend emission catalyst life
- NMMA FC-W certified
! 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.