[Neoliberalnot]

For one, I think Missouri does.

[thackney]

Missouri is one of a handful of states that has an ethanol mandate. In the state, regular and mid-grade gasoline are to have 10 percent ethanol mixed with conventional gasoline.

But the mandate has a loophole. If ethanol becomes more expensive than conventional gasoline, then gas retailers are allowed to sell 100 percent conventional gasoline.

http://economy.kansascity.com/?q=node/347

[thackney]

Note: The Missouri requirement only took effect this year.

http://governor.mo.gov/press/EthanolSigning070506.htm

Recently, because of the prices, many stopped selling E10 as linked above.

[thackney]

Also forgot to mention, Premium grades are exempt at well.