quote:This is exactly what has comprised non-synthetic premimum oils in Europe for years, and is one of the reasons there is virtually no Group II production there. When "Black Death" surfaced over there in the late 80s and early 90s and the ACEA introduced more stringent standards to combat it, the oil companies in Europe took two routes: PAO/ester based synthetics and Group I/Group III blends.
Originally posted by Ken2: (Hmmm...I wonder if some of the OTC synthetic blend oils are made from cheap GR I base oil plus just enough GR III base to meed API-SL & GF-3 specs, then sold at a premium price as if they're something special?)
quote:Picture this in your head: You take the valve cover off the engine and every square inch of metal is covered with a thick, black, shiny glaze. It isn't sludge and it isn't what we'd normally call varnish. It's been a long time since I read anything on it, but I belive the car makers and oil companies attributed it to the total oxidation of the oil. It was so common that oil companies would actually use it in ads for their premium motor oils. The first time I ever heard of it was in a Mobil 1 ad in a British car magazine in 1992, and that's where I saw the pic. I've never seen the inside of an engine that looked that bad.
Originally posted by Dr. T: G-Man II, can you comment further on "Black Death" took place in the late 80's...what is that? What happened?
quote:Amsoil has to know the difference between the two moly types (it's their business to know). Is this a deliberately misleading statement by Amsoil? [ January 18, 2003, 10:01 PM: Message edited by: TheLoneRanger ]
And then there is Amsoil, group IV that doesn't use it because quote: "This is a chemistry we do not wish to use. Moly as an anti wear additive is questionable, but can be an effective friction modifier. We market our motor oils for long service life, and chemicals such as Moly can come out of suspension and form a paste under the right circumstances. It can also actually be abrasive in large doses. As a side note, the scan we did in the lab showed no evidence of Moly in the new Mobil SuperSyn"
quote:It's probably a brain-cramp by the individual Amsoil employee who answered the question...or maybe prevarication. Ken
Originally posted by TheLoneRanger:quote:Amsoil has to know the difference between the two moly types (it's their business to know). Is this a deliberately misleading statement by Amsoil?
And then there is Amsoil, group IV that doesn't use it because quote: "This is a chemistry we do not wish to use. Moly as an anti wear additive is questionable, but can be an effective friction modifier. We market our motor oils for long service life, and chemicals such as Moly can come out of suspension and form a paste under the right circumstances. It can also actually be abrasive in large doses. As a side note, the scan we did in the lab showed no evidence of Moly in the new Mobil SuperSyn"