<P> Most cars on the road today in the U.S. can run on blends of up to 10% ethanol (E10), and motor vehicle manufacturers already produce vehicles designed to run on much higher ethanol blends . Though E10 is mandatory only in 10 states, ethanol blends in the US are available in other states as optional or added on lower percentages as a substitute to MTBE (used to oxygenate gasoline) without any labeling, making E blends present in two - thirds of the US gas supply . </P> <P> Ford, DaimlerChrysler, and GM are among the automobile companies that sell "flexible - fuel" cars, trucks, and minivans that can use gasoline and ethanol blends ranging from pure gasoline up to 85% ethanol (E85). By mid-2008, there were approximately seven million E85 - compatible vehicles on U.S. roads . However, a 2005 survey found that 68% of American flex - fuel car owners were not aware they owned an E85 flex . This is due to the fact that the exterior of flex and non-flex vehicles look exactly the same; there is no sale price difference between them; the lack of consumer's awareness about E85s; and also the decision of American automakers of not putting any kind of exterior labeling, so buyers can be aware they are getting an E85 vehicle . Since 2006 many new FFV models in the US feature a bright yellow gas cap to remind drivers of the E85 capabilities, and GM is also using badging with the text "Flexfuel / E85 Ethanol" to clearly mark the car as an E85 FFV . </P> <P> A major restriction hampering sales of E85 flex vehicles or fuelling with E85, is the limited infrastructure available to sell E85 to the public, as by October 2008 there were only 1,802 gasoline filling stations selling E85 to the public in the entire US, with a great concentration of E85 stations in the Corn Belt states, led by Minnesota with 357 stations, more than any other state, followed by Illinois with 189, Wisconsin with 118, and Missouri with 112 . Only seven states do not have E85 available to the public, Alaska, Hawaii, Maine, New Hampshire, New Jersey, Rhode Island, and Vermont . The main constraint for a more rapid expansion of E85 availability is that it requires dedicated storage tanks at filling stations, at an estimated cost of USD 60,000 for each dedicated ethanol tank . </P> <P> Chrysler, General Motors, and Ford have each pledged to manufacture 50 percent of their entire vehicle line as flexible fuel in model year 2012, if enough fueling infrastructure develops . Regarding energy policy, President - elect Barack Obama pledged during his electoral campaign to significantly reduce oil consumption, with measures that among others include mandating all new vehicles to have FFV capability by the end of 2013 . </P>

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