Hello Dave:
Thanks for the reply. I was just poking at TigerTank. We are related and at the opposite extremes of expected duty for our MB diesels.
der Dieseling Doktor chimed in on the oil issue again this week on the Ritter/Easley list. I'll post his comments for the benefit of others. TigerTank has already recieved a copy of this. The reply will reveal the gist of the question:
Quote:
----- Original Message -----
From: "Marshall Booth"
To:
Sent: Thursday, April 24, 2003 3:41 PM
Subject: Re: [MB] Re: Mobil Delvac-1
> Four or 5 years ago I first brought up the question about Mobil 1 and
> Delvac 1 to a Mobil tribologist, he and his collegues agreed that they
> didn't believe there was ANY good reason to use Delvac 1 in an MB auto
> diesel. The properties that distinguish D-1 from M-1 are NOT things that
> will make any difference in light duty diesel service (and automobile
> and pickup trucks are LIGHT DUTY). That particular engineer had owned a
> 123 300TD and had used M-1 in it since new and it then had 225kmi on it
> (original timing chain still on it with less than 2 deg of chain
> stretch). He could have used ANYTHING he wanted in his car and selected
> M-1 over D-1. He put his money where his mouth was and it worked for
> him. Delvac 1 is a more sophistocated product - blended to meet needs
> that an MB diesel simply doesn't require - and isn't expected to need.
> So to the question about whether Delvac 1 is "better" oil, the answer is
> a resounding "YES it is." To the question about whether that matters,
> the answer is a somewhat less emphatic - "probably not!" I use it
> because the 5W40 viscosity seem ABSOLUTELY perfect for use in MY cars as
> a year round oil. When 0W40 becomes easily available and equavalently
> priced with M-1 15W50, I will probably use 0W40 since there seems to be
> NO need for D-1 in my cars. For now I have M-1 15W50 in one car and D-1
> 5W40 in 4. ALL run GREAT.
>
> Marshall
> --
> Marshall Booth
> "der Dieseling Doktor"
> '87 300TD 168Kmi,'87 190D 2.5 210Kmi, '84 190D 2.2 226Kmi, '85 190D 2.0
> 156Kmi, '87 190D 2.5 turbo 217kmi
> Diesel Technical Advisor MBCA, member GWSection
> http://www.dhc.net/~pmhack/mercedes/mbooth1.htm
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Hope this is helpful.
-Scott
__________________
https://goo.gl/photos/J8ZUVvAYiYqLxbD18
1989 560SL 111Kmi
2007 E550 4Matic 157 Kmi
2000 F250SD 7.3l, 1996 Explorer Ltd 5.0l
1965 VW Beetle Deluxe 115 Kmi
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Previous MB:
1983 240D Euro Manual 144 Kmi
1983 300SD 495 Kmi
1986 190D 2.5 100 Kmi
1986 300SDL 202 Kmi
1991 300D 2.5 Turbo 91 Kmi
1998 E320S4 (4-matic wagon) 140 Kmi
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