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Speaking of Great Cadillac Engines...

Cadillac CTS 2.9-liter turbodiesel V-6

Cadillac CTS 2.9-liter turbodiesel V-6

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If you followed my trip from Atlanta to Los Angeles, just completed in an old Mercedes-Benz diesel running on veggie oil, you know I'm a fan of the diesel engine. And since I have great respect for the design, performance, and engineering behind Cadillac's latest CTS sedan (and stunning CTS Coupe, and CTS Wagon...), it pains me to know that you can get the vehicle with a 2.9-liter turbodiesel V-6, but only in Europe. Actually, it makes me cry.

GM of Europe produces the engine, pictured here in polished stainless-steeled, thermoplastic intake manifolded, compact oil-coolered glory. To my eye, it's not only a technological marvel but a work of art.

Emissions regulations, costly catalyst systems to remove harmful NOX, and the unpopularity of diesel fuel in America will probably forever consign this engine to Europe-only duty. But brands like BMW, Mercedes, and Audi are attempting to bring diesel back in America with products like the brilliant BMW 335d, the Mercedes E320 BlueTEC, and the Audi A4 3.0 TDI. 2009 and 2010 should be interesting, hopefully victorious, years for the diesel engine in the U.S.

I wonder if GM would lend me a CTS diesel to drive cross-country on biodiesel? I can dream...--Colin Mathews

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