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Forum: Maxum Maintenance 03-02-2014, 12:59 AM
Replies: 4
Views: 27,768
Posted By Baby Blue
Mercruiser 7.4L engine oil question

What do you use for engine oil in your 454? Mercruiser recommends quicksilver 25w40. I was told by a mechanic to run synthetic. just curious any thoughts from the board here.
thanks, BB
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