Article still carried in ScienceDaily. (ScienceDaily, BTW, is outstanding website on new scientific findings, esp. medical). Some correlation between motor oil handling and reu-arthritis. My apologies in advance, if already posted, and hopefully mods can omit:
http://www.sciencedaily.com/releases/2005/10/051003081742.htm
http://www.sciencedaily.com/releases/2005/10/051003081742.htm