BTW... At PepBoys the other day i noticed that the Formula Shell bottles now have updated labels indicating SM. The label on the front is the same, but the label on the back has changed.
They still had a few of the older GF-4/SL bottles on the shelf, but i was glad to see the new labels.
Of all the oils i've tried, my car seems to like Sopus products, which is fine by me.