I agree that the US-made Red Label is without question old, pre-GC stock. You can tell, even without the batch number, from the lack of the "BP Group" logo, which appears on the GC bottle, just below and slightly to the right of the "Castrol North America" blurb which is in the lower left corner of the rear label. I believe it was in '03 (maybe '04) that BP absorbed Castrol, and at that point, their logo went onto the bottles. It's on all of them now, so if the fabled post-GC US-made Red Label really exists, I would expect to see an M05xxx (or very late M04xxx) batch number, AND the BP Group logo on the back too. So far, I've seen no such stock in the 15 or so AZs that I have occasion to visit from time to time.