FORD OIL SPECS

[MADMIKE]

Does anyone know what the difference is between the 2 Ford oil specs? One is for 5W-20 (wss-m2c930-A)and the other is for 5w30 (wss-m2c929-A)? Are these specs tougher than SM/GF-4?

 

[AndyH]

Some threads turned up with a search (in case you haven't read them yet):
http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=1;t=009370
http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=1;t=007902