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1. Oil question (score: 1): Author: "Alan Seigrist Blue 100" <healey.nut@gmail.com>; Date: Wed, 7 Feb 2007 06:07:56 +0800; I have several unopened quarts of Castrol GTX 20W50 that have been on the shelf about 5 years. Yesterday I opened one to satisfy my thirst ... and after pouring it into the BJ8 I noticed a layer of; /html/healeys/2007-02/msg00154.html (6,807 bytes)
2. Re: Oil question (score: 1): Author: dracmarine@aol.com; Date: Tue, 06 Feb 2007 20:23:32 -0500; Its just old dinosaur bones settling to the bottom; I am going to switch to --Original Message-- From: healey.nut@gmail.com To: Healeys@autox.team.net Sent: Tue, 6 Feb 2007 2:07 PM Subject: Oil quest; /html/healeys/2007-02/msg00157.html (7,306 bytes)
3. Re: Oil question (score: 1): Author: "Frenken, Eric" <efrenken@lctax.de>; Date: Wed, 7 Feb 2007 11:23:34 +0100; I know for sure that on multigrade oils like Castrol GTX 20W50 the polymers (kind of molecular chains), which are responsible for the attribute 'multigrade', deteriorate with time, turning the multi; /html/healeys/2007-02/msg00175.html (8,916 bytes)
4. Re: Oil question (score: 1): Author: Bob Spidell <bspidell@comcast.net>; Date: Wed, 07 Feb 2007 06:26:42 -0800; I'd ad that the base oil for multigrades is actually less then the "W" oil; e.g. for 20W-50 the base oil is about 15, since the VIs (viscosity improvers) have an effect when the oil is cold. The mai; /html/healeys/2007-02/msg00184.html (9,302 bytes)
5. Re: Oil question (score: 1): Author: "Frenken, Eric" <efrenken@lctax.de>; Date: Wed, 7 Feb 2007 15:52:22 +0100; Bob, thanks for your additional information. Your argumentation about the base oil's viscosity being 15 instead of 20 sounds logical to me. The straight-weights do adhere better to the surfaces, that; /html/healeys/2007-02/msg00185.html (7,919 bytes)
6. Re: Oil question (score: 1): Author: bspidell@comcast.net (Bob Spidell); Date: Wed, 07 Feb 2007 18:39:25 +0000; I wouldn't do that. While there's great debate on oil, everything I've read says DON'T mix viscosities. Mixing brands is OK, but you don't want to do a science project on your freshly rebuilt engine; /html/healeys/2007-02/msg00197.html (10,153 bytes)
7. Re: Oil question (score: 1): Author: "Brent Porter" <brentshealey@gmail.com>; Date: Wed, 7 Feb 2007 15:16:33 -0500; AMEN! BP. -- Brent Porter BT7, AN9, TR4 Indianapolis, IN; /html/healeys/2007-02/msg00201.html (6,962 bytes)
8. Re: Oil question (score: 1): Author: "Frenken, Eric" <efrenken@lctax.de>; Date: Thu, 8 Feb 2007 08:22:45 +0100; Bob (Spidell), what's wrong with mixing viscosities? I ask out of curiosity. I've done that now for a long time without any negative side effects on recommendation of an motor oil company. Eric Heins; /html/healeys/2007-02/msg00210.html (9,444 bytes)
9. Re: Oil question (score: 1): Author: Bob Spidell <bspidell@comcast.net>; Date: Thu, 08 Feb 2007 06:25:41 -0800; This is a topic with a lot of opinions, and the rules are constantly changing (witness the ZDDP issue, which wasn't an issue a year or two ago). Anyway, I've read it's not a good idea to mix viscosit; /html/healeys/2007-02/msg00212.html (8,699 bytes)

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