You blower motor is close to the end of it's usual life. Trying to lube is a waste of time.
Go to ebay buy a new blower fan motor for Saab 9000 from www.eeuroparts.com and get free shipping or go to their web site.
Search for how Bob C and I have done the replacement with and without removing A/C evaporator box. http://www.lexingtonma.net/users/BobC/blower.php
More info on changing motor:
http://www.alfabb.com/bb/forums/showthread.php?t=36850&highlight=blower+motor