He ( Doug Hillary in that thread posted ) made a statement that any diesel oil that is not also rated for gasoline engines should never be used in gasoline engines. So, in my 92 Explorer, it has run Shell T6 5W-40 since the product was introduced. Runs fine and cleans things out. I've also run the T6 5W-40 in all my Honda bikes.
According to Mr. Hillary, now that Shell T6 5W-40 has dropped the "S" rating, it shouldn't be used in gasoline engines; however, that same 5W-40 that is not SN rated does carry the JASO MA2 rating, which IIRC, is a gasoline engine rating.
Can't see any reason to stop using Rotella 5W-40 in either the truck or the bikes merely because one rating was dropped. If I'm wrong, someone please advise.