Many will say that if Yamaha recommends Yamalube then that what they will use. And no one can argue with that. Here comes the however part of this post. My and alot of others experiences with Yamalube is alot of plug fouling and smoking and carbon build up. I bought my HPDI last season and the previous owner only ran Yamalube. I have since switched to running Amsoil HP which is a full synthetic oil. I really cant say enough about it. I swear my engine runs better with it. As far as the ring free its great stuff and you should be running it all the time with every tankfull. Just do your research and when you find an oil that you feel confident in stick with it. Good luck you wont be dissapointed in your Yamaha