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Well, so far everybody is right. Wallys synthetic is made by Saftey-kleen and it is recycled oil that has gone thru the ISO/SYN process. Not bad oil for the money as it is a GP III but I wouldn't push it passed 3500 miles. Shell was the contractor for their dino oils 2 weeks ago. Before that it was Warren Distributing. Today, who knows. It goes to the cheapest bidder for that contract period. Their filters are made by Champion and will rank above average for flow and filtration.