Sierra Marine Catalyst Premium Blend 4-stroke engine oils have 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, sterndrive, and inboard
* Exceeds all 4-stroke requirements including FC-W and FC-W catalyst compatible
* Formulated to offer maximum corrosion protection
* Advanced lubrication for extended engine life and wear protection
* Capitalizing “ZDDP” anti-wear additive technology to prevent phosphorus depletion and extend the emission catalyst life
* NMMA FC-W certified