If you search this site under Wal-Mart or SuperTech you will get a number of discussions.
Wal-Mart oil in the U.S. is currently made in a Shreveport blending plant that used to be a separate company. It was bought by QS, which was bought by Pennzoil, which was bought by Shell. Warren Performance Products also might have contracts, either for blending or more likely for packaging. Shell is closing the Shreveport blending plant and will probably shift production to excess Equilon capacity. Thus Wal-Mart might become like the old Havoline.
Canadian Wal-Mart (Tech 2000) may be SafetyKleen (who probably just packages), or PetroCanada. Some production may have been moved to China.
Wal-Mart controls all product testing, so unlike many private brands (i.e. Advance Auto) it's kind of difficult to tell exact sources.
Similar things happen in tires. In addition to their house brand (Douglas) which is made by Kelly (Goodyear), they control tread designs of name brand tires. Thus if you find a BFG Excentia (unless it's from Europe), you're looking at a tire only available from Wal-Mart. It's priced against the BFG Radial TA but is an entirely different tire. There were earlier posts here and on Edmunds that indicated that some ranges of Delco filters were entirely different at Wal-Mart as compared to K-Mart. Some Delco filters (for non-GM cars) are outsourced to Champion and other suppliers-- thus a Delco (no longer carried by Wal-Mart I believe) used to be identical to a SuperTech.
Although I have no proof, I've wondered whether Wal-Mart's tremendous buying capacity might result in custom name brand oils much like tires and filters. The Consumer Report study of motor oils in the mid 90's mentioned the great variation of Shell products from one part of the country to the other. Oil production is a lot more manufacturing centric than gasoline which is a commodity item branded by various retailers depending on the pipeline, but the sources of oil might be less pristine than some on this board think.
Although I doubt if SuperTech oils are top tier neither do I think they're just barely adequate. I don't necessarily think the present oil will get better if it becomes mainline Shell than the present brew. Of the four major sellers, SuperTech is behind Pennzoil IMHO, but might be the equal of QS, Valvoline or Castrol. As far as I know there have been no analyses of SuperTech synthetic oils on these boards although a UOA of Tech 2000 synthetic held up very well for a group III oil.
Seven bucks for five quarts of any group III would be a very good price.
[ July 23, 2003, 12:32 PM: Message edited by: csandste ]