Walmart....
Some might laugh after reading this post, all the talk about AMSOIL, which is the best high performance oil money can buy. But for me, availability is key.
I have used the Quicksilver "Full Synthetic" in my 97 model 787's for the last couple years. Internals are clean as a whistle. The oil is a low ash, non NMMA, non TCW-3 oil. I buy it by the gallon.
If you were going to use the Quicksilver, I would recommend the "blended" for your model. Read the back label, it'll say it's approved by BRP to be safe for your Seadoo. The oil is in the automotive section, not the sporting good side.
Make sure you read the label though, because Quicksilver makes TCW-3 oils too.........:cheers: