SAE 5W-30 with the API Certification Mark displayed is recommended for 2005 MY 4.0L V6 applications only. The Ford Engineering Material Specification for SAE 5W-30 service fill oils is WSS-M2C929-A, which specifies ILSAC GF-4 requirements and the additional specifications beyond ILSAC GF-4 that are the same as SAE 5W-20.
Physical/Chemical Property Requirements Specification Results Limits Viscosity @ 100 °C (ASTM D 445), mm2/s, 5W-20 5.6 - <9.3 _________ ________ Viscosity @ 100 °C (ASTM D 445), mm2/s, 5W-30 9.3 - <12.5 _________ ________ HTHS Viscosity, mPa-sec @ 150°C & 106 1/sec (ASTM D 4683 or CEC L-36T-84) New 5W-20 Oil 2.6 min _________ ________ New 5W-30 Oil 2.9 min _________ ________