Mercruiser oils and lubricants, available by mail order. Mercruiser oils and lubricants should always be used in any Mercruiser inboard. Mercruiser oils are formulated to perform and protect your inboard and non-OEM oil should never be used. We have seen too many engines fail because the wrong oils were used.
Genuine Mercruiser Oils and Lubricants are made to exacting standards to withstand the harsh saltwater environment in which marine engines operate. They are not expensive and all Quicksilver products perform well in harsh saltwater environments. Why risk you or your family or your engine out at sea by using non-OEM parts?