Just curious if anybody had a link they'd like to suggest. I 'think' Autozones oil is done by Coastal (or was it Citgo)? It seems like the older Western Auto (now Advanced Auto Parts) is or was by Havline. I've seen it mentioned here that WalMart's Tech2K is by a specialty division of QState. Any corrections or additions? Any 'tricks' for IDing the maker of these relabel jobs. I recall that the Western Auto oil had bottles that were identical to the Havoline bottles is all I can think of.