When I had a snow blower I used 40:1 in the spring after I did the tune up. Stored it that way through the summer and ran it once a month. One thing that it does is keeps the needle valve in the carburetor well lubricated. Ethanol gas eats away at seals throughout the fuel system.
The guy who told me about it was the dealer I bought it from. In the almost 14 years I had the snow blower I had zero engine problems and zero starting problems when winter came.
Sta Bil works if you have Ethanol gas. That's the only kind the state allowed, so I always put it in the gas. If you live in snow country, another trick is to not buy gas until the day before the snow is supposed to come. Even with stabilizer it won't last more than a couple of months. I used to put the "old" gas in my truck and get new snow blower gas every month or so during the winter. I also bought premium.
I used to help a couple of neighbors keep their machines running. Not just snow blowers, but lawn mowers as well. I found Motor Medic and Sea Foam worked well to get engines running.
The last thing you want when there's a foot of snow in your driveway is for your snow blower not to start.