I just took a quick glance at the link, and if I'm not mistaken, NONE of these would be what I'd consider a "name brand." (Although I did see a bottle of O'Reilly's oil lower on the page, whatever that was about.) If you buy a oil that meets a certain spec as indicated by the label, you're basically covered, barring rare defective batches of product (I'm looking at you, recalled Havoline oil and Texaco antifreeze from maybe 10 or 15 years ago). But certification claims are only as good as the brand backing those claims. So "API SM" means everything if it's on a bottle of Quaker State, but it means nothing if it's on a bottle of "Billy Bob's High Performance Oil." Shorter version: Why would anyone consider buying Billy Bob's oil and think he's getting anything worthy of being poured into an engine?