Actually, the bypass filter does a better job of straining the gunk out of the oil than a full-flow because the filter element can have a tighter weave. It doesn't have to pass enough oil to keep the bearings lubed. The oil just gets filtered a little at a time instead of all the oil going to the bearings getting strained before it gets there. An ideal system would be a full-flow filter to catch the rocks, marbles, and big chunks, and a bypass filter to really clean things up. Cummins and most Detroit diesel engines are set up that way.
Jerry
Last edited by Hotrod Lincoln; 02/14/2011 2:14 AM.
