Originally Posted by X-Farmboy
Keep in mind, there are 2 different blends of Sta-Bil. You need to use the Sta-Bil for ethanol gas if that's what you're treating. The old 'regular' Sta-Bil doesn't work with ethanol.
Which old 'regular' Sta-Bil doesn't work with ethanol?

"DOES THE ORIGINAL STA-BIL® FUEL STABILIZER NO LONGER WORK WITH ETHANOL FUELS?

This is absolutely NOT true. STA-BIL® Fuel Stabilizer is effective in storing gasoline for up to 12 months in ALL Ethanol blended fuels, up to E-85. It prevents gum and varnish formation/build-up caused by the breakdown of fuel and also helps prevent corrosion from moisture/humidity during storage.
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http://www.goldeagle.com/brands/sta-bil-faqs