The move to official automaker support for higher blends of biodiesel has been a slow one. One important step along the way were the establishment of American Society for Testing and Materials (ASTM) standards for B20 (20 percent biodiesel mixed with 80 percent petro diesel) in the middle of 2008. Last year, General Motors announced that the new 6.6-liter Duramax V8 engine would be factory certified to run on B20 sometime this spring. That time is now.
In conjunction with the Detroit Auto Show introduction of the Chevrolet Volt concept, General Motors is also unveiling an entirely new vehicle architecture that they've dubbed "E-Flex". As the name implies E-Flex is a platform for electrically driven vehicles. The key to this platform, though, is the inherent flexibility they've designed in. During the presentation of E-Flex Beth Lowery, GM Vice-President Energy and Environment talked about the future of energy supplies. GM sees diversity as one