As far as I have read, Motorcraft is still being made by Conoco Philips. Being that MC is a manufacture label, they can change their supplier without noting it on their label. CP also makes Kendall, 76, 66 Trop Artic and their own CP lubricants.
I found that Trop Artic, Kendall, and 76 5w30 synthetic blends are GM 6094 approved. I did not expect to see MC on GM's 6094 list since MC is a Ford product.