Oct 23, 2016 #16 OLDBULL8 Good Morning Ya'll. Supporting Member Joined Feb 12, 2009 Posts 9,923 Reaction score 338 Location Delphos , Ohio The difference between an IDI and a PSD oil flow. Attachments 7.3 IDI Oil_system.jpg 77.9 KB · Views: 34 OilSystemFlowDiagram 02 7.3.jpg 66.6 KB · Views: 31