Quote Originally Posted by beechstreet View Post
If it is 0w-30, its German Castrol (unless its a really really really old bottle with a yellow label). Look on the back label and it says made in germany while all the other weights are made in the USA
I've only found it at Autozone. One of my favorite oils. I even run it in my turbo SE-R because it "acts" like a 40 weight when hot according to BITOG.

I've also had decent results with the non-GC stuff in more pedestrian applications.