Oil pressure concerns

[SilverRiff]

I have a 1987 Monte Carlo ls I got about a month or so ago, and am still in the process of tuning it up as it seems like everything is completely original to the car ( except new plugs, wires, basic maintenance stuff). The one thing that is greatly concerning me is that my oil pressure gauge is consitantly showing lower oil pressure, around 13-15, right on the line to the orange "warning" block. After the car has been sitting overnight, when I first start it up, the gauge shows right in the middle at 30. It seems like once it heats up is when it drops. When I start driving it will usually go up to about 20 or so, but it still loves to jump around no matter what I'm doing. Also I notice that it seems to be slightly effected when I turn on something electrical, like the headlights, domelights, radio, etc. When I turn on something, it will dip slightly. Any thoughts? Should I be overly concerned?

 

[Peter]

well judging by it being affected by other electrical components i would seriously look into a bad sending unit, ground, power, etc. your oil pressure may be just fine but is definetly important that you look into it

 

[Bonnewagon]

I'd hook up a mechanical gauge just to see what the oil pump is truely putting out. If it's fine then there's the electrical side already mentioned to diagnose.

 

[SilverRiff]

Sounds good, I'll start spraying on the nut buster. Hopefully it won't snap off like the one on my Cutlass' 455 did. I will report back what I find!