I have seen this over and over....and once again I will say, running gear through a filter will NOT sterilize it!!!...It only strains it...It gets particles out of it... that is why it is xalled something like a 4 micron filter. It is also called a sterile filter because the filter itself has been sterilized....It will NOT sterilize the oil. Heat is the only way to sterilize the oil!!!!
Don't take my word for it, look it up!