AMSOIL recently revised the formulation of its Series 2000 0w30 and renamed it as the Signature Series Synthetic 0w30. Supplemented with a proprietary ashless antiwear system for improved heat and viscosity control and boasting a 10 percent increase in TBN (13.2), new Signature Series 0W-30 sets the standard for protection and performance.
More info on the product can be found on this page of my dealer website:
AMSOIL Signature Series Synthetic 0w30 