A page from Ford Motor Co.'s maintenance guide for 1949 models:
photobucket
Change oil filter when it clogs?
The complete manual:
http://www.tocmp.com/manuals/Ford/1949/MechanicsHandbook/index.htm
photobucket
Change oil filter when it clogs?
The complete manual:
http://www.tocmp.com/manuals/Ford/1949/MechanicsHandbook/index.htm