It sounds to me more like an electrical problem than an actual oil
pressure problem.  Logic would say that the pressure is higher until it
warms up.  Probably grody connectors ... maybe at the ground points.

Of course, the best course of action is to put a pressure gauge on it
... either for a temporary test ... or better, a permanent installation.

Mike

Bob O'Brien wrote:
> Hi Westy lovers,
>
> I have a concern. Recently, in the colder weather, the oil pressure
> light on my '85 Westy will stay on very, very dimly, until the car is
> warmed up or driven for 5 or 10 minutes. I'm wondering if it is
> dangerous for me to drive the car until the light goes out
> completely. The '85 has less than 100k miles on it, so the engine is
> still "young."
>
> Thanks for your help.
>
> Bob O'Brien
>