According to Amsoil,the preferred choice would be Interceptor.
Hp would be a secondary choice.
I switched from SeaDoo to Amsoil Interceptor.
So far, I am very happy.
I can get the Amsoil alot cheaper that the SeaDoo oil.
I seem to burn alot cleaner: less smoke, cleaner RAVE valves....
My skis are pre-mix too.