I have had several Vanagons with the 2.1 L WBX in the last few years. At
one time or another I got the flikering oil light. In every case a switch
to the MobilONE 15-50 wt oil combined with a MANN oil filter solved the
problem. It think it has to do with spring pressure inside the filter. In
the last case, a brand new overhaul produced a red oil light at Idle. Had
new oil ( though not my preffered Mobil ONE 15-50 WT) and a new oil filter
( though nt my prefered  MANN). Changed the filter and oil to preferrd type
and no more problems.

In one case I DID have to replace the pressure switch. No more problems
with the swich working. It was a bugger, though. Problems on getting the
right wrench for the job,

John

On Oct 1, 2017 16:17, "Richard Golen" <rgolen@hotmail.com> wrote:

> Mine did the same, once,  when I used 20-40 one late spring. Changed to
> Mobil1 15-50, didn't happen again.
>
> Ric
>
> Sent from my iPad
>
> > On Oct 1, 2017, at 17:14, Eric Caron <ecaron1@COMCAST.NET> wrote:
> >
> > When I first picked up my 85 we came home on a hot day.  Wehn we pulled
> up to the tole booth the oil light came on.  We pulled over and read the
> owners manual.  It said after prolonged driving it  the oil light might
> come on at idle.  If it goes away when you excelarate it is ok.
> >
> > So, that is what would happen and all was ok.  This never  happened
> again though I did change from 20 50 regular oil to 15 50 Mobil 1 so that
> might have helped.
> >
> > I’m sure others will have better info but I thought I’d share my similar
> experience.
> >
> > Eric Caron
> > 85 GL Auto Westfalia
> >
> >
> >
> >> On Oct 1, 2017, at 2:19 PM, jed batchelder <seabeejed@HOTMAIL.COM>
> wrote:
> >>
> >> i have a 1983.5 vanagon i recently went on a camping trip and
> everything was fine till i got back to town.  when i would hit a light and
> be stopped my oil pressure light would flicker.  it will go out as soon as
> i hit the gas a bit or start driving.  i do have a new oil sensor in there
> and i do have good oil level...  so what does this mean?  i do have a new
> o2 sensor and other than that the engine sounds and runs great.
>