Ford oil spec M2C913-D search on the Nulon website;
http://www.nulon.com.au/products/by-...ils/?specs=348#
Nothing else on the Nulon site meets the spec of M2C913-D, doesn't meant you cant use something else though! Just means it does not meet the spec as given by Ford...
Another link to Ford Oil Specs;
http://www.oilspecifications.org/ford.php
Not sure that 913-D has been superseded yet though?