TROY, MI – The debate over using diesel engines for U.S. light vehicles continues to rage. Jeffrey R. Holmstead At the eye of the storm are the Environmental Protection Agency’s ultra-tight Tier II emissions standards – slated for phase-in beginning next year – that auto industry interests say threaten to throttle the diesel’s promise. And with momentum gathering to adopt the diesel as an easy answer for the auto industry’s steadily declining fuel economy, proponents have ...

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