5w-30 vs. 10w-30 ?

scott craven

Well-Known Member
Recommended oil viscosity seems to be 10w-30 for most 4-stroke outboards.
question for the oil guru's , is 5W-30 ok to use in the winter or is it too thin ?
 
I would run what is spec'd for your motor at the ambient temp you're running it. What motor/hp?
 
It doesn't get that cold here. 10w30 would be fine.
 
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