All I can say about the Stabil is that I had a brand new generator with a BS vanguard 9 hp way back in the '90's. Power was out when I live in SC went all the way to Atlanta to get the generator. Power was out well over a week from an ice storm. Everyone said use Stabil. So the last tank we added it to the last 5 gallon of gas that went through the generator. Back then ethanol wasn't mixed in everywhere. A few months later I went to start the generator and nothing. Ended up taking it to the local small engine shop. They said the carburetor was gummed up. So that done it for me. I still have the generator. I haven't used it lately. After the Stabil issue all I ever done was turn of the gas and run it until the line runs dry. Left the remaining gas in the tank. When needed I added whatever new gas it needed and it has always started right up. Except when I broke the pull cord. lol