Harv,
Good question, the varnish and contamination must go somewhere in order for a system to work? Right? The OILKLEEN technology uses a unique 18 multiple electrostatic fields with a special depth media between each field. As the oil is forced through all 18 energy fields the contamination will take a charge and then bond to the depth media inside the filter. This unique design will remove almost 20 pounds /9kg of material. The OILKLEEN filter is a light GREEN color and will turn a nasty black tar color once the element is full. You can visually see the change!