If you don't want to use Ethanol, check this map and buy your gas in a non-RFG county:
http://www.epa.gov/otaq/rfg/whereyoulive.htmWith a new law that goes into effect on May 5, oil companies will not have product liability immunity if they use MTBE to reformulate gas. Since it is believed that MTBE contaminates groundwater, oil companies are switching to Ethanol in areas where they must provide reformulated gas. Some parts of the country, particularly in Texas, have relied on MTBE so the switch to Ethanol will probably cause a tight market in some areas.
You may want to call a gas station or two in a non-RFG county near you to see what they are selling. There can be local blends in some areas. For example, in Wisconsin, they almost passed an E-10 (10% Ethanol) law which would have required Ethanol for regular grade gasoline everywhere in the state. This was a political bone that they were trying to throw to corn farmers. Fortunately, this got shot down in the state senate and we will not have statewide use of Ethanol.
I live in an RFG county that uses Ethanol. Fortunately, I live close enough to a neighboring non-RFG county to buy gas so I don't have to deal with Ethanol rotting the gaskets, etc. on the boat.
(If you're in the Milwaukee area the closest non-RFG stations are the Exxon station on Hwy 41 just over the Dodge County line or the Shell station at I-94 and Johnson Creek in Jefferson County. The BP station at I-94 and Ixonia has been selling Ethanol - check before you pump at Ixonia.)