I finally found the German Castrol on my own (the four quarts I used in my previous car I obtained from pscholte). I was actually looking for another oil (Mobil Drive Clean Plus, which I was going to try-I could not find a single bottle of it!). I found exactly five quarts, which is the amount that my car requires. They did not have any more. These are the first bottles of German Castrol I have ever seen at the AutoZone in Pueblo, Colorado. Maybe the stuff is starting to get around.