There are still some out there who hang their hats on the results of used oil analysis, such as Blackstone Labs. These reports only show what metals have been wearing during the miles from your last oil change, they DO NOT define what plastic and rubber degredation have occurred due to the use of non OEM approved fluids! IMHO, the owner who swear by the lab results of these tests, while not using OEM spec fluids are PINHEADS!