I have a 88 s4 vert and my oil pressure gauge is starting to act up. Now it will start reading near 0 as the car warms up and a bit after it warms up, and when i accelarate, where it would normally read 55-60 psi it will read id say about 30-40 psi. however after a few minutes, i havent had a chance to check really i;d say probably 5-10 minutes after driving it will act as normal and idle at 30 psi and go up to 55-60 psi when driving. Is my gauge shot? or is my car broke

 

Gauge is probably fine- check sending unit (most likely culprit) and wiring.

 

have you checked to connection at the sender? That connection gets really dirty over time and my just need to cleaned.

 

Cars at the body shop right now so just getting ideas, ill check it soon as i get it back. Thanks guys.

 

Mine does the exact same thing and it's due to a faulty sending unit. I haven't bothered changing it because I know there is good oil Psi. Besides, I'm switching to aftermarket gauges/sensors.