I'm able to buy ethonal free gas 2 miles from the house, that is what I use for long term storeage
Check out PUREGAS.ORG for pure gas. Just traveled to Pigion Forge last week and seen several places advertising 100% gas
If you can fill up with that before storeage would recommend it
Unless your car is like mine and needs more octane, filled the Dart with 110 before storing this year and still put blue STABIL in it for cheap insurance for the few gallons of gas that isn't pure gas........ LOL