General Motors has revised their 6.6 liter turbo diesel engine to feature B20 capability. This new engine will also be designed to meet the new emission standards laid down by the government.

The new Duramax will power the updated GMC Sierra heavy duty pick ups, 2011 Chevy Silverado, Chevrolet express and GMC Savana full size vans. GM has plans to unveil the 2011 Chevrolet Silverado heavy duty truck at the 2010 Chicago Auto Show that will be held on Feb 10.

B20 capability in heavy duty trucks will maximize fuel efficiency and reduce emissions and minimize the dependence of petroleum.

General Motors have always been appreciated for their continuous efforts in marketing of flex fuel vehicles which is capable of running on E85 ethanol. Bio diesel is similarly produced with renewable fuel from plant matter generally from soybean oil.

The bio diesel engines have undergone various tests and they perfectly meet the ASTM International Standard D7467 which covers bio diesel blends between B6 and B20.

General Motors has upgraded some seals and gasket materials to make the Duramax 6.6 liter engine fuel system compatible with B20. To reduce the chances of fuel getting waxed or gelled an additional heating of the fuel circuit was added. This system features a injector that supplies fuel for the regeneration process and saves  fuel and  works better with B20  than in  cylinder post injection.

General Motors offers a five year /100,000 miles powertrain warranty on the Duramax diesel engines.