R Rich dzl 12v guru Joined Mar 20, 2011 Messages 741 Oct 9, 2014 #1 Has anyone seen any high RPM (4,000 +) oiling problems with early cummins 12v (ABC ) casted blocks .
ahale2772 New member Joined Oct 27, 2011 Messages 2,442 Oct 9, 2014 #2 not likely. 4000 rpm isnt taxing on a 5.9 in most configurations.
