Can anybody explain why Castrol seems to be taking their time in introducing the German Castrol to the US market? The stuff apparently sells big time when it is available. Castrol has a product here that could compete with Mobil 1. They should be mass producing it, and perhaps selling it in other viscosities. Are they testing the market to see if it will sell? Are they getting rid of surplus stock from Europe? Every UOA of the German Castrol seems to indicate that it is a super oil. Based on what I have seen from the various UOAs, I certainly would have no problem using it in my car. It fact, thanks to pscholte, I did try four quarts and my car ran great. But the stuff is almost impossible to find. Castrol has a product that if mass-produced would offer major competition to the big synthetic oil in America-Mobil 1. Why do they not seem to recognize that fact?