I was only curious enough to ask. Not acutally try to find the stuff on the net though.
My kwaka uses Shell Nautilus TCW3. Why you ask, short answer = 5 monkeys. Explanation: The people I bought kwaka from said they always used that, and the people they bought it from said they used that becuase the original owners used that, and Causeway Kawasaki seemed to only have the shell for sale for PWC's.
Buggered if I know why it was chosen, or if it has anything special other than the blue colouring to see it mix with the fuel (Only thing I ever read on the side of the container).
it costs on par with similar TCW3's, so for this jetski, I'm sticking with it. The next one though hopefully wont burn oil (Sorry Slasher).