A couple of answers for you, first of all I did read your attached link, found it to be quite interesting that many people have used Vavoline for years and have never had a problem, actually reading down the first 2 pages it was about a 50/50 split.
As for you second question, here is a link, not from either of the manufactures, which I would tend to believe,
http://www.swedishbricks.net/700900F...Comparison.htm
Mike
