Like many store brands, the company on the label usually contracts out to some company to make the stuff and put their label on it. Walmart doesn't own a refinery so some oil company makes it and puts Super Tech on it. If they made a poor quality, Walmart would be writing a lot of checks to cover all the damage. I still use Mobil 1 10W30 in the winter and 10W40 in the summer, but if I couldn't afford the Mobil, I'd use Supertech.