Skuzzy:
Most of the
oil will go through the guy with the lower restriction, but the
oil that takes the path through the finer filter will have all the particles smaller than 10 microns (or so) removed. They will not find their way back. So even if only 25% of the
oil goes through the fine filter the oil will be kept much cleaner since the oil is going through one filter or the other very often.
http://www.moroso.com/catalog/catego...?catcode=20002
Bob