These "canned" fuels are probably ok, if you don't use your "tools" very often. But, at $6 a qt., it seems a bit pricey. If you have a gas station in your area which sells Hi Octane/Ethanol Free gas, you can probably get that for 1/4 of what you are paying for the "pre-mix" varieties. In our area, we have a station which sells Ethanol free 91 octane for $2.79/gallon. I use that, with the proper Stihl oil mix, in all my Stihl tools, and even run it, every other fill, in my mowers, etc...keeps the carburetors clean.