PERFORMANCE
Shall meet all the requirements of the “ILSAC GF-4 Minimum Performance Standard for Passenger Car Engine Oils" plus the following:
3.2.1 ASTM Sequence VG Test
Follower Pin Wear, average 30 mm, max.
(Cyl #8 intake and exhaust)
Ring Gap Increase, average 225 mm, max
(Cyl #1 and #8)
PHYSICAL/CHEMICAL PROPERTIES
3.3.1 Copper Corrosion 1b max
(ASTM D 130 or ISO 2160, 3 h at 100 °C) (Dark Orange)
3.3.2 High Temperature Deposits, mg 30 max
(TEOST MHT-4)
3.3.3 Physical Appearance and Odor
Shall be clear and bright with no objectionable odor.
3.3.4 Contaminants
Shall be free of carcinogens, toxins, metals not removed in refining or from previous
use.
http://www.ilma.org/resources/ford_service_fill_specs.pdf