Originally Posted by Gray Beard

Pull up the pure gas site on your puter and look up your area. We have a Rebel gas station down the road that was supposed to have alcohol free gas but when I tested it the gas had 5% alcohol in it. The station wasn't listed on pure gas though. I still have my little alcohol tester from when I was working in a small engine repair shop so I test the gas to see how much alcohol is in it.

Originally Posted by MTK

I've read about reformulation of Avgas for years now. To me, it ain;t happening, no in my lifetime anyway.
Regardless, I've used avgas in my small gassies (to 60cc) almost exclusively for 5 years. It works great but here are the details:
-Takes a slightly leaner setting, maybe 1/16 turn, than auto gas
-It isn't as expensive as some might think. At present it runs about 3.50$ a gallon. So gallon cost ready to go will be around 5$. To me that's not expensive.
-Local Muny airports are the best sources. They are alot less fussy about aircraft N numbers and such
-Stability is measured in years
-No smell to speak of
-Lead exists but content is pretty low

BUT:
-Power will be slightly down over autogas premium. If you're getting 7500 rpm with premium, you will get around 7200 with avgas
-The lead content is high enough where the plug will need cleaning every 12-15 gallons. No big deal. Besides after a dozen gallons, the engine insides should be looked at and some minor cleaning is almost always required around the head, if the mixture is right.