So many choices for gasoline.

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The Dinogas stations in the more rural areas tend to have ethanol free premium for things like chain saws and generators.  As gas tends to lose octane over time, the e-free gas is typically premium so it will store better.  All brands in an area typically get their gas from the same source - refinery or bulk supplier.  The only thing that changes is the additive package that is unique to the brand and that is put in at the time the tanker is loaded.  Other than that, all gas on the street is the same.

Sadly, I mow and trim so much, my gas doesn't get a chance to age.

Late fall, early winter I fill the gas can with 91e0 and Stabil. What doesn't get used in the snowblower goes into Debbie's car in the spring.
We had a dry summer so I used Stabil a couple times in the mower gas. I didn't need it, but you never know.

The only time I had a mower carb gum up was a year we had a drought.

After more than 10 yrs, I replaced the carb on my 160cc Honda mower engine.  The cost of the OEM part was on the order of $20.  Sadly, the rest of the Husqvarna mower is heading down hill.....kinda fast.  But, before I replace that, I need to find a replacement for my grass line trimmer.

Snow?  I use a shovel, then drink coffee.  Who has anyplace to go in the Winter?