Oils.....
There are two other oils that Seadoo endorses for use in their watercraft and they are the mineral and synthetic blend of the "Quicksilver" brand oil. First, you have to determine what type of oil your running now. If you don't know, I'd suggest you buy the synthetic blend, remove all the old oil by sucking it out with a shop vac or some other type vac, through the inlet rotary chamber hose.
Then, replace the oil. If you don't remove the oil in the injector lines, you'll be able to just re-fill the oil tank and be ready to go.
I've been using the "Quicksilver" oil now, going on my second season. Pistons look good..........so, I'll continue to use it. I don't have a Seadoo dealer near.
Oh yeah, that oil can be bought at Wal Mart. When looking at it (I buy the gallon jug), turn it over and read the back label to make sure it's the type for Seadoo's.........they make several blends, so make sure you get the correct one!...........:cheers: