Ravenol J1V2122 10W-40 4-Stroke Marine Oil - Outboard Semi Synthetic NMMA FC-W Approved (4 Liter) Quality German made oil specifically developed for use in outboard engines where "FC-W" oil specification are recommended Superior quality licensed oil approvals for NMMA FC-W and FB-83139K quality specifications Practiced and tested extensivly in marine outboard 4-stroke engines from Mercury Verado, Tohatsu/Nissan, Johnson/Evinrude, Yamaha, Honda, and Suzuki Excellent viscosity stability while providing optimal lubrication and aging resistance Extremely high safety lubrication reserves under highly stressed lubricating conditions and is suitable for extended oil change intervals