It's tough to get a deal on TGMO. Ebay sellers for $60 to $70 for a case every now and then but shipping kills it unless you can pick up locally (no shipping in that case).
Best I could get was $5.79/qt for 2 cases as a "one-time consideration, will not honor it again" deal from a local dealership. Anyway between those 24 quarts and one more free oil change from the dealer, I am good for another 6-7 oil changes which should be about 60K to 70k miles