This has been a VERY informative topic, and thanks to all you guys who posted some very valuable info for the rest of us. I only have one question that no one seems to have mentions so far, and that is: what about the various synthetic lubricants now available, such as Amzoil, etc., etc.? Has anyone done any studies on wear resistance using these types of lubricants, or are they mentioned as part of a study on petroleum oils?
