(edit: Also figured this was a better place for the topic, since Maintenance and Tech seem to have a rather, eh, blurred line...)
I REALLY don't want to get into this system. All the other things I've dealt with have been easy to get to... hell, even the head gasket was easy compared to the oil system. But here it is, it seems to be an "unimportant" problem, but a worrying one none the less. Unimportant, because it only revealed itself after replacing the gauge that would tell me (meaning it's probably been like this for a long-ass time).
Oil pressure. When I first got my Fiero, I had a problem with HIGH oil pressure, so I thought. I don't know if it'd always done it, but the oil pressure gauge would start tweaking out at low RPMs, seemingly shorting out and pegging the gauge at totally random times, like a vibration was causing it. It looked like a VU meter on a rock song or something. So I replaced the sensor. BAM, problem solved. No more whacked-out readings... and to be more precise, it actually showed me a more logical reading as well.
When the car's cold, even after it comes down to 800rpm when the O2 sensor warms up, the oil pressure gauge shows slightly above the red mark. If I tap the gas and get the RPM up to 1000 or so, the pressure shoots up to the normal range and stays there no matter where I rev from that point. Kinda like a logarithmic graph. But after driving the car for a while, like on the freeway going to work, when I stop at a light and it's idling in Drive (haet automatic), the oil pressure enters the red area and the Oil light flickers on and off - sometimes staying on.
There's plenty of oil, up to the top of the add/full gauge, and it was just changed with good 10W/30 oil (I can't remember what brand, but it was a name-brand, not cheap shit). The guy at AutoZone recommended I add some of this "oil stabilizer" stuff as well, so I did, but after finding I already had it at "full", I didn't add the entire bottle. I didn't think it was that great an idea either...
Now, this doesn't really worry me at the moment because obviously a gauge isn't going to cause a problem, meaning it's probably been like that for a while and hasn't, well... hasn't caused any problems yet (the engine still runs great). But I'd love to know if it is really a problem, from a professional's point of view.
![Wink ;)](./images/smilies/wink.gif)
And, uh... is there anything I can do about it but just let it happen?