SAE 25W-40 | Quart These 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 Cat 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.