I don’t like to cheap-out on my investments, I wouldn’t even think of just running any of my engines dry, because lets face it, your carb will still have fuel in the float, and that fuel can still gum up your carb.
Rather than messing around with mixing up a fuel cocktail (Seafoam, Stabil, etc.), what I do is use racing fuel (110 octane) near the end of the season with the auger, and always with my Stihl chainsaw and weed whacker. Never have to worry about what is in the hose, because racing fuel has its own pump and its BLUE, so you know for sure. Racing fuel is on the same level as AvGas and will last up to 20 years, at least. It will not break down the oil that you mix it with unlike other octanes when left in the tank or can for an extended period of time. In my snowmobile I always siphon the gas out of the tank at the end of the season and put in a gallon or two of racing fuel and it for awhile. Always fires up like a champ the next season!
Racing fuel has a much higher flash point, which makes those cold starts much easier. However it comes with a price, I filled my last 5 gallon jug for $6.30/gal, but I feel that it is well worth the cost to protect my investments