I would say as good of oil as any and cheaper because they don't have to spend millions advertising on NASCAR and tv and radio. A house brand like NAPA or O'reilley oil would be. Probably made and packaged by Warren oil as many private label oils are. I am not an Amazon prime member,but for members shipping is free so that is a plus. I looked a few weeks back on the Amazon reviews and do not recall any users not content with Amazon oil. It meets the API and SN and Dexos and all the certifications so I were to switch brands, (I see no reason too) I would not be hesitant to use Amazon motor oil.