In theory you are right, that at operating temp, the oil should
perform the same.
In practice, it is a little different. The 0w-40 is made from a
lower viscosity base than the 15w-40. 0w-40 is thinner at Op temp,
and tends to create more lifter noise on OM60x engines. That is why
Herr Doktor said not to use a 0w- or 5w- oil in OM60x or OM617
engines.
I've played with Amsoil oil and its fine, I hate their '70s pyramid
marketing system...
I'd like to dispute your M1 assertion first, #1 they didn't "Go to
5w40" both the 5w40 and 15w50 have been available for years.
#2 at operating temperature 5w40 and 15w40 are THE SAME. Thats what
the w40 means...
When the engine is cold 5w40 will flow to the bearings more quickly
because its thinner than 15w40.
-Curt
Date: Mon, 23 Aug 2010 06:36:50 -0400
From: "Larry T" <l02tur...@comcast.net>
To: <mercedes@okiebenz.com>
Subject: [MBZ] Amsoil
Message-ID: <75a0585e5b924844afee23a386036...@laptop>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi Gang --
I know we beat this subject to death once in a while - sorry to mention
it again. M1 is getting harder and harder to find around here (Central Va)
and I'm thinking about changing to Amsoil. Especially since M1 went to
5W-40 - I just don't like that low viscosity stuff. For Diesels pre-07
they offer a 15W40 which can go for 3X's the factory change interval.
I'll probably go around 2X's the interval.
I've tested some Amsoil thru my Oil Analysis business and it's always
had excellent results. One customer drivers a 18 wheeler Tractor with over
400,000 miles on it and it still tests perfectly. IIRC he changes the
filter every other test.
Have any of you had good experience using Amsoil? Maybe we can limit
the discussion to this topic? ;-) Thinking about using it in my '91 300D
with 185K Miles ....
Thx
LarryT
91 300D
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_______________________________________
http://www.okiebenz.com
For new and used parts go to www.okiebenz.com
To search list archives http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
