My summer fun cars get put a way for 6 months with an almost full tank of 93 oct. gas and Stabil, never had a problem over the 17 years I've been doing this.
All my other engines, boat, mower and snowblower only use non ethanol gas, when in use or storage, when in storage they also get Stabil.
We have a temp swing up here of about 90-100 degrees.