LUCAS OIL STERN DRIVE INBOARD ENGINE OIL SAE 25W-40 - (6) 1 QT. BOTTLES•Designed to improve wear protection •Increase catalyst life in newer inboards using catalytic converters •Fortified w/special synthetic additives that coat moving parts to guard against rust corrosion & moisture during long storage periods •Meets or exceeds NMMA FC-W (CAT) performance •Meets or exceeds MERCRUISER® sterndrive & inboard marine performance requirements