Let me be the first to say, I don't buy anything at Wal-Wart, especially anything for my race car, my truck or car, anything I value, not clothes, nothing, never ever been in one, haven't lost a thng in any of them, having been in business, when they first started their move to take over the world in perceived savings, and having to deal with the poor folks who were taken in by the "low prices", it is not in my bones, to darken their walls, with what I learned in business, anything is fair game, to make it look like you are saving money there, and the manufacturers know that the consumer will be the last line of inspection, so anything goes on their shelves. I buy my products from old, established producers, from the front line stores, who are doing their best, to stay in business. Now, pick your oil, and pick your place to buy it, but remember, the local home town merchant knows a lot about quality also, and he is interested in keeping you from making mistakes. Bob