Date: Fri, 15 Sep 2006 14:39:51 -0400
From: "gw" <>
Subject: Re: oil sludge?

"darthpup" <> wrote in message > Your comments appear to stem from false theory. The problems I refer > to were confirmed by inspection of the lubricant at operating > temperatures. In one case the oil had become so thick that it > completely jammed the oil pump. > > MV oils increase their viscosity with temperature within and beyond > engine operation temperatures. A good single weight oil such as > Valvoline will sustain its viscosity with temperature. Thats why you > see so many race cars using the product. > There is no requirement for increased viscosity with temperature to > sustain proper lubrication. Actually, quite the opposite is the > requirement. > The polymer you refer to is an oxidizer which increases in chemical > activity with temperature. It has no way of limiting its activity and > OVER thickens the oil, per your observation of 10W50. > My comments stem from Chemistry. Your theory that hot MV oil gets thicker is false. The additives in MV oils prevent them from thinning as much as a straight weight oil. Are you really trying to say that straight 30 weight oil maintains its viscosity from 0C to 100C? 30 weight will be like maple syrup Return to Main Index

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