The 2009 Buick Lucerne sedan will join General Motors' lineup of flex-fuel vehicles that can run on either ordinary gasoline or E85, or any combination of the two.

The Lucerne, the first flex-fuel capable Buick passenger car, will be among more than 15 GM models with flex-fuel capability in 2009, up from 11 offerings this year.

E85 ethanol (a blend of 85% ethanol and 15% gasoline), is a cleaner-burning alternative fuel that can reduce greenhouse gas emissions by as much as 23 percent compared with gasoline.

GM has committed to make half of its US production flex-fuel capable by 2012 providing the infrastructure is in place. GM built more than 1 million flex-fuel capable vehicles worldwide last year. It is committed to helping to speed cellulosic ethanol to market via its partnership with Coskata Inc., which can make ethanol from a range of renewable sources.

For Buick, the FlexFuel-capable Lucerne is a no-cost option for consumers.

The Lucerne is the latest vehicle announced for the 2009 GM FlexFuel lineup. The four-cylinder Chevrolet HHR was revealed at the Chicago Auto Show in February and the Hummer H2 and H2 SUT were announced in March as part of the opening of the first public E85 pumps owned by a dealership, Classic Chevrolet-Hummer in Grapevine, Texas.

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FlexFuel Chevrolet HHR 2009 will be available with an Ecotec 2.2-liter or Ecotec 2.4-liter four-cylinder engine, both of which will be compatible with E85.

E-85 FlexFuel HUMMER HX After three months of sketching and sculpting theme work for the new HUMMER concept, each designer had the opportunity to present scale clay models to Bob Lutz, GM vice chairman and Ed Welburn, who chose which design would ultimately become the HX concept.