In addition to the crazy people, I also found some vehicle links in my searching.
http://www.volpe.dot.gov/ Emissions related
http://www.epa.gov/otaq/http://www.epa.gov/otaq/ld-hwy.htmhttp://www.epa.gov/otaq/consumer/reports.htm **
http://www.ncvecs.colostate.edu/links/Default.aspx Safety Recalls and TSBs:
http://www-odi.nhtsa.dot.gov/tsbs/ ** - Probably the most interesting to me, testing by the EPA on fuel savers and emissions reducers.
(Yes, I know I'm being lazy about actually writing up HTML for the URLs but I'm not feeling well and I just want to get all of this down before I forget.)