Although I hated spending money in China, I did this on an old American chainsaw because it was the only alternative, and it did indeed work like a champ. I will say that was probably the last time I intentionally bought anything from China. I refuse to do business with them now. I run truefuel but still drain it when I'm done and then run the motor until the carb is empty. I hate doing this on 2 strokes because that's your oil supply also, but there is no viable alternative.