For all the Mobil1 fans here, I see that the Mobil1 site has been recently updated. It has lots of great information such as "myths about synthetics" (seal questions, using Mobil1 as factory fill, etc.) as well as a FAQ section, technical info and a sweepstakes to enter. Anyone interested in switching to synthetics in general should find the information useful as well.

http://www.mobil1.com/index.jsp