I think this is a fairly new product...my Amsoil supplier just mentioned it. 10W-30 and 20W-50 high zinc
content with strong corrosion inhibitors. Good for older engines, weekend cruisers and long-term storage.
Sounds like it was made with Panteras in mind.
https://www.amsoil.com/storefront/zrt.aspx?zo=1606470
Michael Frazier
Gruppo Rompiculi Corsa