Oil Pressure?

[SwansC4]

I have been reading these forums lately and received some good info. I have some basic questions about oil pressure. Any help would be great! What is the normal oil pressure? What does it mean when the pressure is low?

 

[6speeder]

http://autorepair.about.com/cs/generalinfo/l/bldef_589.htm

 

[SwansC4]

http://autorepair.about.com/cs/generalinfo/l/bldef_589.htm

Thanks for the help! Good sight