Didn't get many posts on this, but here are the data.
code:Looks like Canada, US East Coast and Colorado got one lot. The second column might be fill lines. "TAG" is German for "Day", too, so I don't know. Perhaps everyone didn't provide all of the alpha characters in the codes. Significant difference in the second column identifiers might mean that the oil is filled in more than one location, too. If anyone else with the oil cares to provide numbers, I'll update my table and repost. If anyone has knowledge about how Castrol lots out their blends, please share.4DSC M023386B 784 Patman M023386B 784 4DSC M023386B 784A1 Patman M023386B 784A1 FowVay M023386B TAG785 G-Man M023386B TAG785 Pscholte M023386B TAG785 Tenderloin M030426B T/W0504821 YZF150 M030426B T/W0504821