Has anyone ever had this done? I was thinking of having it done on my oil after my new 350 overheated and the tranny blew out. Amsoil offers a test for around $20. They send you a sample kit and then you send it back to them. Then they give you a written report on the condition of your oil and any repair recommendations. They claim that they can tell the condition of the engine internals. Any other companies out there that do this? Or would I be wasting my money?