Comparison with other by-pass filters with regard to higher oil consumption?
About 20-25 years ago a system was introduced to the market which was able to remove particles up to 15mµ. In this system the hydraulic stop light switch was removed and replaced by a tee-piece. The connections at the tee-piece then were: a) stop light switch, b) by-pass filter. From the by-pass filter the oil was lead to an opening in the valve cover where an insert nut was put in. As through this opening more oil was entering the engine room as needed, an overpressure was achieved and a lot of this oil was burned causing that more oil had to be added. This system failed because the oil was led back in the wrong way.