I am thinking about upgrading from the ACE Hardware brand of 2-cycle and gear oil that the previous owner used in my boat and switching to Royal Purple.  The motor is a 1989 so I am wanting to extend its life as much as possible.  Thanks for your input and if you have any other suggestions please send 'em my way.

I personally have not used Royal Purple in a marine application. However, I use it in the trans and rearend of my Mustang, and we use it in the motor and rearend in our race car. Excellent products. Can't see why it wouldn't work for ya...