2010 Audi A3 TDI

  • Audi A3 TDI clean diesel - European model

    In Europe, roughly half of all passenger cars sold come with fuel-efficient diesel engines. But for a variety of reasons, passenger diesels haven't caught on in the States, though the number is climbing slowly. Audi, proud of its diesel engine technology--which, among other things, has won the prestrigious 24 Heures du Mans endurance race in the Audi R15 TDI--is forging ahead and plans to offer a diesel variant of every model it sells in the U.S. by 2015. Modern clean diesels usually deliver fuel economy one-third to one-fifth better than that of a gasoline engine of similar power. They're...

  • 2010 Ford Super Duty F-450 4WD Crew Cab Lariat Grille
    Why Can't 'Flex-Fuel' Clean Diesels Run Entirely On Biodiesel?

    Our article last week on Ford's doubling of its flex-fuel models included a mention that diesel models of the new 2011 Ford Super Duty pickup trucks will run on either pure diesel fuel or a mix of up to 20 percent biodiesel, known as B20. Reader Suzanne Johnson responded with the following...

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