That may be the oil you want, but I'm not sure since I don't run cats. But, IIRC all the oils with the "r" in the name are oils that have high zinc content. Been a while since I have looked at the product line so I'm not sure about the nomenclature any more.
If you have to call Torco again, ask for Ernie. He's a sharp dude, been at Torco since the early 90's and worked his way up.
Let us know.
BTW, just because an engine isn't using oil don't mean you can't get zinc migration to the cats. It happens.
