Quote:
Originally Posted by jchase
Also, there has been a lot of controversy on this. I texted a Yamaha technician about the use of Synthetic oil. He stated NO! It is a splash oil system and synthetic oil is to thin. Use 10 w 30 oil for our climate here in Florida. I change mine every six months.
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I agree, especially since my 2014 Yamaha manual specifically states the recommended oil as “YAMALUBE 4-cycle oil or SAE 10W30”. No mention of Synthetic oil.