Dude you need to read up here. Otherwise in a couple months you are gonna be on here complaining about your motor problems and the crap oil you put in your boat.
These boats need an API-TC oil. They can not use any old oil. Especially a regular TCW3 outboard 2 stroke marine oil. It is the Low Ash no Ash that makes the difference. Sea Doo engines require low ash. Most other 2 stroke oils are ashless. There a few other brands that are cheaper, like I said, you can find Quicksilver at Wal Mart. There is also , Amsoil, Mystik, and Lucas to name a few.
There are lots of "experiences" with the cheap brands and non API oils. do a little research here and you will find pics of the carnage and stories of overheated engine components and failures.