Marine parts, fast fulfillment, real support
Get the right part without slowing down your season. PowerBoatSupply helps boat owners order with confidence, backed by trusted marine parts expertise and responsive support.
✓ Fast shipping
✓ Fitment help
✓ Secure checkout
Description
Sierra 9421CAT2 4-Stroke Synthetic Blend Catalyst Outboard Engine Oil, 10W30, Qt. - 18-9421CAT-2
- Meets requirements of modern 4-stroke recreational engines with or without emission catalyst systems
- Approved for all 4-stroke applications including Outboard, Sterndrive and Inboard
- 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
- Prevents phosphorous depletion and extends the emission catalyst life
- NMMA FC-W Certified
- For use in Mercury 4-Cycle Outboard Engines requiring 10W-30 Sold in case packs only
Warranty Information
We are an authorized reseller for all products listed on our website. Please contact the manufacturer for warranty info.
View AllClose