The Mann filter for the Wasserboxer equipped Vanagon has a bypass valve
which lets the oil bypass the filter element at pressures above 1.5
bar.  The Mann diesel filter doesn't let the oil bypass the filter until
the oil pressure reaches 2.5 bar.  Critical?  I don't know.  A "bar" is
between 14 and 15 lbs. of pressure.

-Dana-

Helen Fahy wrote:
>
> Hi Jay,
>
> I use 4 qts and add another 10oz for the slightly larger diesel oil filter.
> The 10 oz was a measurement I did on a std and diesel oil filter.  I filled
> both up with oil, measuring the quantity prior to filling, the difference
> was 10 oz..  I also fill the filter prior to installing.  Actually it is not
> completely full, I add oil to the new filter until it begins to spill out at
> the angle that it must be held at to install it on the engine.
...
> Currently I am using Shell Rotella T non-synthetic 10w40.  This is the
> diesel service rated oil.  Oil pressure is typically (engine rpm/1000) +(3
> to 5) psi, i.e. 3500 rpm:38-40psi.  The oil temp stays about 200-210.
>
> Joe Fahy
>
> ----- Original Message -----
> From: "Jay L Snyder" <Jay.L.Snyder@USA.DUPONT.COM>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Monday, June 18, 2001 3:02 PM
> Subject: Oil Level Again
>
> > Anyone out there
> > running the larger diesel filter with the factory amount of oil (more in
> > the filter, less in the case)?
> >                                                              Jay