As clean diesel technology shifts into the public spotlight, more studies and experiments are being done to test clean diesel fuel and engines. The people behind these tests are no longer limited to vehicle manufacturers or the press, but also the public as well. Discussion about clean diesel technology is spreading through blogs, wikis, and even online video. This collection of resources provides the latest information about specific clean diesel automobiles, how they compare to each other and gasoline-run vehicles, and online diesel discussion platforms.