Sorry didn't mean to reignite the great oil debate!! Purple Royal's packaging is a bit deceiving. Nothing on there states it is TC-w3 (could be in the fine print though).
You are fine. But, in every seadoo... right by the oil fill neck... there is a stickers saying..."Use API-TC. Never use TC-w3." So honestly, there should never be a debate on this.
The problem arises when guys say... "I've been using XXXX brand TC-w3 oil, and it's fine." But, they fail to say, for how long, or in what engine. To be very honest... in the old engines... it will work for a long time. (The ones that only make 60 hp) But, from the 657x engine and higher... there is a marked life depreciation.
Oh... and the other problem is... the additives packs don't mix !!! The story of... "Do not mix 2-stoke oils" is not just an old wives tale. It's not as bad as it was long ago... but there is still a real issue were mixing the oils (because you just needed oil one day, and you bought something that the gas station had) can lead to the oils "Gel'ing". When that happens, the system plugs up, and your engine get's roasted. This is also why the oil injection got a bad wrap. People would be careless (and cheap) with the oils, and when the system plugged from user error... they would say the pump sucks.
Here's a cut open filter from someone who blamed the oil injection failing, for the loss of the engine. I had to point out, that the pump didn't fail. It was his fault for killing the engine. (by mixing oils) So... if you are changing brands... clean out the tank !!!!!