I find this out a day after buying 4 quarts of GC from one Autozone, and 2 more from another. Pooey. Didn't have much of a choice, though. the yellow label was flooding the shelfs, and the German was minimal.
So far the GTP likes GC over Mobil 1 10w-30. A lot quieter overall and easier to start in the cold morning (it's maybe in the high 50s. brr!!).
Where I live the deal is buy 5 quarts of any oil and get a free FRAM oil filter.
I bought my 6 quarts of GC and took the lousy filter merely to cut it open. It is a PH3593. Let me know if you guys want pics of it.