Here is what I found for you.

http://www.grinningplanet.com/2005/04-12/diesel-vs-gasoline-article.htm
At one time, diesel cars were a relatively common sight in the United States. In Europe, they still are, accounting for about 40% of new cars sold each year. Diesel fuel has higher energy content than gasoline, and diesel performance is usually better in terms of engine output. These factors also mean that vehicles running on diesel put less global-warming pollution into the air. Thus, it might seem that in today's world of rising temperatures and fuel prices, diesel is ripe for a surge in popularity in North America.

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