Sales of DaimlerChrysler's Jeep Liberty (Cherokee) CRD diesel in the US are about to surpass the 10,000 mark, double the number expected when Chrysler Group first launched the model in 2005.

The company made the announcement at the Peter Cremer North America biodiesel refinery in Cincinnati, Ohio, which supplies 5% 'B5' biodiesel for the Liberty's factory fill.

Biodiesel is a cleaner burning, renewable alternative fuel that can be made from any fat or vegetable oil, such as soybean oil. The market surplus in soybean oil from one bushel of soybeans makes 1.4 gallons of biodiesel, offering up a lucrative new market for America's farmers without detracting from the country's food supply, according to an industry trade association.

DaimlerChrysler recently approved the use of B20, a blend of 20% biodiesel and 80% regular diesel fuel, in its Dodge Ram pickup trucks for government, military and commercial fleet customers effective from the 2007 model year. It'ss the first US automaker to specifically approve of B20 in a warranty position statement.

Biodiesel has become America's fastest growing alternative fuel according to the Department of Energy. More than 600 retail filling stations sell the fuel to to the public, and 1,500 petroleum distributors carry it nationwide.  More than 600 major fleets now use biodiesel, including government and military, commercial and school bus fleets.