Sierra Marine Catalyst Premium Blend 4-Stroke Engine Oils

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. Features include: * 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 Show Less