Re: What does TCW3 stand for ?
Well, the first "rated" oil was TCW, or "Two-Cycle, Water-cooled", then along came TCW2.
"3" is the latest iteration of the TCW oil. Someday we'll get TCW4, who knows? It's been TCW3 for quite a while.
Here's a recent thread with lots of discussion on the topic:
http://forums.iboats.com/showthread.php?p=2951388
Cheers...........ed