At the North American International Auto Show in Detroit this week, it's not all hybrids and battery-powered cars. Some car companies are making significant investments in a fuel that's not new at all — diesel.
The newest diesel engines are far cleaner than their predecessors, and they get many more miles per gallon. The question is, what's holding customers back from switching gas pumps?
When you look around the auto show, there's a lot of energy and there's a lot of money being spent again. The one topic that keeps coming up, of course, is fuel economy.