The info I got about 0W-40 was from the email@example.com mailing list. I suppose I should have saved it, but I recall having read that 0W-40 is about to make its appearance at Walmart. Incidently, I called Mobil today and the guy on the other end of the line said that it's ok to use 15W-50, and that 0W-40 would NEVER make it to the United States. I don't know who to believe. After years and years of bad experiences with 800 helplines I tend to agree with the guys on the list!