I understand that Mercury QuickSilver Outboard Semi-Synthetic is very clean burning and designed for hard "Racing" use in 2-cycle Mercury Racing 2-Cycle Outboards. It's TC-W3. I am giving it a go at 50:1 in my Suziki/Toro Snowblower.
I was just eyeballing it in the store the other day. $27.00 a gallon is what they're getting down here. Supertech is $10.00/gal. Both are TC-W3... People say the ST smells bad, though. I'm looking for something to use as a UCL in small engines and my truck at around 500:1
I had never seen the Pennzoil synthetic TC-W3 oil until last week. I was at the Bass Pro outlet and they had the synthetic Pennzoil in gallon jugs. That stuff was $32 per gallon, a far amount higher than the regular 2-cycle oils.
I guess that's why Wal-Mart and the autoparts stores don't carry it. It's not likely to be a top seller at that price.
I bought my Pennzoil synthetic TC-W3 at Walmart. It costs a few pennies under $27 per gallon.