oil pressure gauge problem?

[Huw Powell]

> My '93 90CS Quattro has 3 round gauges for oil
> temperature, oil pressure and voltmeter. For the oil
> pressure gauge, Owner manual said that it should be
> 1.8 bar.

I think that is a minimum.  If it's not at least 1.8 bar, you're in
trouble...

> When I start the car, the reading of oil
> pressure is max. (about 5 bar). After drive for a
> while at the normal engine temperature, it is still at
> 5 bar. However, it is back to about 2.4 bar - 3.5 bar
> if the car is stopped, or in neutral

that is normal.

-- 
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/