Isaiah, for my Subie, I use 6 aspirin to treat 12-13 gal. of gas. Aspirin crushed, put in mason jar, then 3 oz of Everclear, and 1 oz Hydrogen Peroxide added. Shake up, let settle re-shake perodically for 2-3 days. I add 4 OZ of Lucas upper cyl. lubricant fuel treat to treat 13 gal gas, then put folded piece paper towel in funnel to catch undissolved residue of MPG R. then fill tank slow at first to rinse all down filler neck.
My key to how much aspirin is half as many aspirin as gal. of gas total. 6 aspirin for 12 gal. gas.
I have tried adding 2 1/2 oz HEET yellow bottle Methanol gas dryer to the mix, and used Denatured alcohol from hardware store along w/ the Everclear. But best as I can tell it seems the Everclear (high proof Ethanol) is the best alcohol type. Only way I know of to get high proof Ethanol is Everclear (or Moonshine if you could). The gubmint regulates Ethanol, and wants the Taxes from drinking alcohol.(look up the Whiskey Rebellion!) Ethanol not subject to Tax must be poisoned (denatured) to make unfit to drink, often Methanol is added as denaturant.
The aspirin must be un-coated.
Tracy G