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Date:         Sun, 14 Nov 1999 00:16:08 EST
Reply-To:     Vantaztik@AOL.COM
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Roger&Zoe Ann Banker <Vantaztik@AOL.COM>
Subject:      Re: technical oil viscosity question
Comments: To: wdavidson@thegrid.net
Content-Type: text/plain; charset="us-ascii"

No matter what the viscosity, warm oil flows easier then cold oil. Warm oil is not thicker than cold oil. As for multi-weight oils, there are 2 answers. Standard 20-50 oil is 20 weight oil that is treated with polymers to not lose its lubricating quality at higher temperatures. The polymers degrade with use, so the oil gradually loses some of its upper temperature protection. Synthetic oils are natural multi-weights, and do not lose viscosity range with use.

In a message dated 11/13/99 6:40:34 PM Pacific Standard Time, wdavidson@THEGRID.NET writes:

<< Okay, I'm confused about something.... My understanding is that when using multi viscosity oil like 20 - 50 that when the oil heats up the oil actually gets thicker (50) and when the oil is cooler like on start up the oil is thinner (20). Is that correct? If so, why does oil seem to be thinker when it is colder... like that's why I warm the engine up a little before doing an oil change... so it will drain out faster. Okay so where is my thinking wrong? Thanks, Bill 90 Westy Syncro >>


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