Can I add Marine Pro to the engine oil on a Mercruiser engine? [SOLVED] 0 Answers Can I add Marine Pro to the engine oil on a Mercruiser engine? Asked by Allen H. In Kentucky Add AnswerCancel I have this question too. Submit Ask a Question Hide Suggestions Most answers will appear on this page within 24 hours. Be sure to state your question/s clearly. It always helps to include basic details about your engine like make and model! Submit
