Pennzoil makes a Premium, semi-synthetic TC-W3 (Two Cycle-Watercraft, 3rd iteration) for two strokers and sits side by side with Mercury TC-W3 oil at Wally World, for half the price. If they make that, surely they finish the task and support 4 stroke requirements. I haven't seen it on the shelf, but I haven't been looking for it either since I run TC engines. But, the bright yellow containers are hard to miss. Tried a.......www search engine?
Disclaimer: I don't recall if the Verado is a 4 stroke or not...I was thinking it was and the Optimax is their high tech TC.