My only thing is that I wanted to use an oil that I could find easily. With most of my riding in the U.P., it's not a easy to find Yamalube if I were to ever need to. I would've actually been using Royal Purple all these years if it were easier to find up there too. Not that I expect to really need to find oil, but you never know.. One JB Weld job to a cracked oil tank in your hotel room after dragging your sled back to town might make a readily available oil a better choice.
I honestly don't think it's really going to make a huge difference what you use since it's not likely you're going to go 5k on an oil change in one season anyways. Most any synthetic would realistically work just fine as long as you aren't switching brands and neglecting to change it.
I'd be more worried about using a good filter rather than deciding between which of the top brands of oil to use.
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