Ya I've done this when I forget to fill my straight gas in the morning I've used 2 cycle before I would never...ever put it in my engine you need proof? Get some paper pour a dab of 30w on there feel how thick it is watch how fast its absorbed into the paper this shows again how thin it is. Do it also with 2cycle oil it absorbs into the paper very quickly showing how thin it is. Now remember when an engine heats up oil gets warm and thinner what do you think will happen when that thin 2cycle oil gets thinner it would be like living your engine with water. The fact that someone is actually saying it would be ok even with disclaimers is beyond me.... Especially on a forum dedicated to fixing the machines proper.....
This topic has gotten ridiculous... Most small push mower engines run on 30w or 10w30 don't use anything else.... And brand doesn't matter