Quicksilver SAE25W40 Marine 4-Stroke Engine Oil, 1-Gallon: * Specifically formulated for use in all non-catalyst marine 4-stroke outboard, stern-drive and inboard engines requiring certified FC-W oil * Contains significantly more performance additives than automotive oils and stands up to the challenges of operating in a more corrosive marine environment * Ultra-premium grade base stock and special additives make this a superior quality oil * Meets or exceeds API service requirements for SJ, CF-2 and CH-4 * Specifically recommended by one of the world"s largest recreational marine engine manufacturers * Exceeds durability and corrosion protection required by the National Marine Manufacturers Association