I keep reading here that Mobil 1 has bad iron wear numbers. Does that include Mobil 1 AFE (advanced fuel economy) 0w30? I like the idea of saving 20$ per OCI, but not if I'm going to need an engine overhaul. It seems like something fishy is here - I thought that Mobil 1 synthetic has an extremely high reputation, and is one of the most premium oils you can get. Should I return my Mobil 0w30 to the store? I tried using "search" on BITOG and can find nothing, and google search shows nothing.