[Vwdiesel] 0w30 Mobil 1

[LBaird119 at aol.com]

In a message dated 3/3/2002 10:46:25 AM Pacific Standard Time,
steve at dropkin.net writes:

> >>I was under the impression that the Mobil-1 was *not* recommended for
>  >>diesel use... it's intended for gas applications and doesn't handle soot
> as
>  >well as a diesel-specific oil.  Also thought that the TDI wanted
>  >5W40 viscosity.
>
>  Right on both counts. Mobil 1 (not to be confused with Mobil Delvac
>  1) is rated only CF, not the CH VW specifies for TDI lubrication. In
>  addition, VW does not specify an oil "lighter" than 5W.
>
  But he was under the impression that it was NOT recommended for
diesels, CF IS a diesel rating.  It's just not as high a rating as CG or CH.

In a message dated 3/3/2002 11:56:27 AM Pacific Standard Time,
vanman at shentel.net writes:

> Is the viscosity all that important on the newer TDI's or isn't it better to
>  have superior lubrication?

  Part of the idea of viscosity is to provide a cushion between the metal
surfaces, that doesn't get smooshed out by the pressures.  The superior
lubrication would give less friction during the "smooshing" process.  My
best guess anyway.   :)
>
>  For the record, all my previous 6 diesel VWs (except TDI's) and current '82
>  Vanagon diesel use Castrol 20W50 in summer and 10W40 in the winter. I have
>  exceeded 200,000 on all of them but the Vanagon with zero engine problems.
I
>  change oil regularly at 3,000 with them.
>

  Not to offend but is the Castrol diesel rated?  I looked briefly a couple
of
times and never found a "C" rating on any standard Castrol products.  It
also seems to have a tendency to "amber" the internals.  A friend stopped
using it when his Subaru turbo rings stuck on him.  Switched to a diesel
rated oil for the better detergent abilities (suspend soot/carbon).  I've
seen
some of the orchard engines torn down that looked like they'd already been
to the hot tank!  No brown, black or amber anywhere.  Just shiny metal.  :)
     Loren