Make sure you have a real German filter like Mann or Mahle. It makes a
difference, this from someone who has had the same experience as you.

If that doesn't fix it, dig deeper. But try a real filter first.

Jim

On Wed, Feb 19, 2014 at 4:54 PM, Steven Shelton <shelton4@gmail.com> wrote:

> We left today in our 1985 1.9L Westfalia for a one week camping trip when
> about a hour from home in Interstate traffic the oil pressure lamp started
> flickering.  I pulled over and checked the oil.  If anything it was over
> the full mark.  The engine sounded fine so i took back roads to get home.
>  The light stayed off at slow speeds or stop and go traffic, but at
> sustained speeds above 45 or 50 it would flicker, sometimes quickly and
> other times slowly on and off.
>
> The Castrol 20W50 oil only has about 1,500 miles on it, but it's been 6
> months since it was changed.  I'm changing it now.
>
> My question is, can there be a problem with low oil pressure if the light
> stays off at low RPM?  From what I've read, it seem like when oil pressure
> is low the light is more likely to come on when the engine is idling, not
> when it's running at 50-60 MPH.  The engine is VW rebuilt 8 years ago with
> 54,000 miles on it.
>
> Besides the oil change, the only other thing I can think of is to check the
> wiring at the sending unit when the engine cools down.  Is there anything
> else I can do before we try to leave again?
>