In his fastlane blog, GM Car Czar Maximum Bob Lutz recently whipped-out his jargon generator and "it'll cost X thousand per car more to do this thing everybody wants us to do" excuse to explain why diesel engines ain'tgonnahappen in the American market. At the tail end of the something-less-than-riveting video clip, MB surprised us all, grabbing his lantern and proclaiming "The diesels are coming! The diesels are coming!" According to Bob (not the most reputable source), GM's developing a V6 diesel for passenger cars and a V8 diesel for its SUVs. Autoweek's done the right thing: asking if GM's last foray into diesel-powered passenger cars has killed the concept for all time. Alan Starling, a former chairman of the National Automobile Dealers Association, says he's not worried about GM's dire diesel history. "Those memories are painful for all of us," he says. "But I would rather have that discussion than not see customers at all."