FWIW - no UOA, but my son just finished a 5600 mi run using gold colored GC (sorry - no date code info avail). He had been using green GC for several oil changes prior - 98 Firebird, 3.8 L 6 cyl. He saw no difference in oil consumption - less than a pint. And no difference in how car ran or sounded. So he's started running second batch of gold GC. He's not an oil freak so no date codes, UOA, etc. I'm not much better - I did glance at one of the new bottles though. I think it said meets A3/B3/B4.
Since the car did tend to consume more M1 5W-30, he's still happy with the GC - regardless of color.
Since the car did tend to consume more M1 5W-30, he's still happy with the GC - regardless of color.
