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.