Mercury / Quick Silver 2-Stroke Outboard Oil / Premium Plus; Capacity: 12.8 fl oz (3,785 ml); This is a premium plus oil for genuine MERCURY 2-cycle outboard motors. Added engine protection in extreme conditions in high horsepower engines. This TC-W3 standard oil maximizes the performance of a two-cycle outboard engine with a clean burn. Compatible with OptiMax high performance models (Pro Xs) and racing models (300XS). The oil and contents of the product number "92-858027Q01" are the same.