This has probably been answered before.  What type of oil should I run in a stock marine 460.  21ft open bow. 

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That was a joke.. I run that in my street bike, way to expensive for a 4-5k rpm engine. I would run a 10-30 valvoline semi syn. That's my plan once my 460 has enough hours on it for its first oil change. Only at 9 since the rebuild.


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20w-50. I usually run valvoline conventional in my 460. To each their own on brand but for the love of god don't run penzoil


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Delo 400 15w40.
Has the zinc for flat tappet cams.

Dan'l