Pennzoil Marine Premium Plus Outboard 4-Cycle engine oil is specially designed for high-performance 4-stroke outboards, gasoline inboards, and stern drives requiring SAE 25W-40 oil. Formulated with an extra level of performance additives to protect outboard engines operating under the most severe conditions, it provides excellent protection against piston deposits and ring sticking and protection against moisture and corrosion in marine engines under harsh conditions. Pennzoil Marine Premium Plus Outboard 4-Cycle engine oil provides greater fuel efficiency compared to 2-stroke marine oil and provides performance-boosting additives that target the needs of marine engines.