I was in an Auto Zone about a week ago, saw "New Euro Formula SYNtec 0W30 made in USA. I did not buy any, but instead e-mailed Castrol Consumer Relations. I stated that the German Castrol carried a lot of respect on various web sites, but the USA made Syn was a different story...
and what was the formulation of the new American made 0w30
The reply "You can rest assured that Castrol SYNTEC 0w-30 available in North America, is the exact same product as Castrol SYNTEC 0w-30 manufactured in Germany"
Consumer Relations
Castrol North America
So... do we now have AC (American Castrol)???