Originally Posted by Virtus_Probi
This is not true per GM's dexos site...AFE is D10101GH015 and EP is D10105GH015 (AP is D10108GH015).
Interestingly enough, the M1 AP line was their first product group to have d1G2 license #s out on the shelves...however, that first batch of jugs/quarts also did not have the d1G2 logo on them. I think they came out before d1G2 went "live" and could not display the logo even though they had qualified under the new standard...d1G2 is a superset of d1 so anything that meets the former also meets the latter.
And this makes sense, since they are all separate products.
Where we see the numbers are the same, it is because the product is the same, regardless of the brand the product is being sold under. This is most often the case with "house brands" and the like.