Question: Who makes O'Reilly's brand of oil?
Answer: O'Reilly's brand of oil is manufactured and packaged by Omni Specialty Packaging. Omni is an independent lubricant manufacturer in Shreveport, LA. While Omni is not affiliated with any "major" manufacturer, we do buy our base oils from companies like Exxon/Mobil and Shell.
Question: What specs does O'Reilly motor oil meet and how does it compare to name brand oils?
Answer: O'Reilly brand motor oils meet API 'SM' service classification and where applicable ILSAC 'GF-4'. Both API 'SM' and ILSAC 'GF-4' are the latest industry standards for passenger car motor oils. These are the same specifications that all "major" brand oils should meet. http://www.oreillylubetech.com/http://osp.cc/index.php