The last comment I would trust from a oil company rep. was that most pump gas has a 90 day shelf life in the car in area that have a 20 + F swing from day to night temps.
As far as yours stinking like shellac in that little time makes me wonder how old it was when you bought it
I have some old non ethanol 91 octane Oregon pump fuel sit in our snow blower from winter three years ago to last winter when it did snow again enough to get it out and it still started and ran decent
It sits in a non heated garage and the winter to summer temps out here vary from low teens in the winter to high 90s in the summers