I'm not sure if this has been posted, but I thought some of you might find it interesting. It's Discovery Channel's "How It's Made" program showcasing how oil filters are made. More specifically, how FRAM oil filters are made. 
http://www.youtube.com/watch?v=YCjXtmbL1Kk

http://www.youtube.com/watch?v=YCjXtmbL1Kk