I am curious what people in related fields think of the four ball wear test. Of the tests I have seen done on oils, it seems to be the most relevant, indicating how well the oil performs at reducing wear on metal engine parts. I saw on Mobil's website http://www.mobil1.com/products/faq.jsp?catId=19 that they discount this and similar tests as irrelevant. There are two possibilities that I can see; 1) they are correct, it has no bearing on motor oils, or 2) because their oils are handily beaten by others in these tests they wish to dismiss them. Let me know what you think, if you have any good articles or links, please post them too.
[ March 03, 2003, 06:54 PM: Message edited by: nicrfe1370 ]