Re: Synthetic or not…Oil question of the week Home › Forum › Ask A Member › Synthetic or not…Oil question of the week › Re: Synthetic or not…Oil question of the week RICHARD A. WHITELifetime MemberReplies: 1840Topics: 140 July 23, 2018 at 12:35 pm #79951 Almost all my motors I run are bushing motors…. hope this is not an issue….. As I run full synthetic in them http://www.richardsoutboardtools.com classicomctools@gmail.com