How important is this specification for a Ford out of warranty vehicle? Are there actually tests and benchmarks the oil must meet beyond GF-5 for this specification? I know that Super tech does not claim to meet this specification, but is there any harm in short OCIs with Supertech 5w-20?
2012 Mazda5 - 0w20 cheaptest synthetic, 6 MO OCI
1994 Olds Cutlass Cruiser Wagon 96K - 5w30 cheapest dino, 6 MO OCI