GM produces several flexible-fuel vehicles that can operate on E85 ethanol fuel or gasoline, or any blend of both. Since 2006 GM started featuring a bright yellow gas cap to remind drivers of the E85 capabilities, and also using badging with the text "Flexfuel/E85 Ethanol" to clearly mark the car as an E85 FFV.
GM is the North American leader in E85 flex fuel vehicles, with over 3 million FlexFuel vehicles on the road in the U.S. As of 2009, GM offers 18 ethanol-enabled FlexFuel cars and trucks in the US, and produce more than one million new FlexFuel vehicles. GM's goal is to have half of their annual vehicle production be E85 or biodiesel capable by 2012.
Despite the significant amount of flex fuel vehicles sold in the US and Canada, the percentage of users actually using ethanol has been very low as many owners are not aware they owned an E85 flex or not enough E85 fueling stations are available nearby, except for the Corn Belt states, where there is a great concentration of E85 stations, as most corn ethanol is produced there. A 2005 survey found that 68% of American flex-fuel car owners were not aware they owned an E85 flex. Several critics have argued that GM and the other American automakers have been producing E85 flex models motivated by a loophole in the CAFE (Corporate Average Fuel Economy) requirements, that allows for a fuel economy credit for every flex-fuel vehicle sold, whether or not in practice these vehicles are fueled with E85. This loophole might have allowed the car industry to meet the CAFE targets in fuel economy just by spending between USD 100 to USD 200 that it cost to turn a conventional vehicle into a flex-fuel, without investing in new technology to improve fuel economy, and saving them the potential fines for not achieving that standard in a given model year.
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