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I've read the debate about using conventional oil for the break-in and somewhat longer. I personally believe that 500 hours of operation to break in a motor is very excessive. This is another one of those Ford vs Chevy topics.
Steven wrote:My Ymaha service manual says to use 10w-30 or 10w-40 oil that meets API: SE, SF, SG , SH or SJ
I looked on my quart of Yamalube and it is API SJ. I looked on a quart of Castrol Automotive oil and it meets(actually it exceeds) API SJ. I can't see any reason not to use the Castrol. My father said he was told by a Honda rep that they are now adding some new additive to Marine 4 stroke oils to combat some issue that is specific to marine engines. May have something to do with the orientation of the power head, my dad couldn't remember. Input to this topic welcome.
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