I have a Honda 50 4-stroke outboard and added in some (maybe half a quart) SAE 25W40 oil on top of the 10W30 that was already in there. The 25W40 is labelled as "Sterndrive & Inboard" 4-cycle oil. Is there any problem with this? It's Quicksilver brand oil. Thanks for any and all advice.
Paul
Paul
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