My oil pressure gauge is acting like a tachometer?
Can't say it'* ever done this before...
I was driving it today, and I don't think it was doing this initially...but then again I wasn't really paying attention either...but when I looked down I noticed that it was sweeping back and forth with engine rpms. It never dipped below 40, but it would push 90-100 psi before shifting, and I wasn't pushing it hard, maybe 2500 rpms or so. I think at idle it would dip down to 40-50 psi but I can't really remember. I had been driving it maybe 10-15 minutes when this happened. It never pegged 120 psi that I could see. It'* pretty warm outside, maybe 65 degrees, and I had driven it earlier in the day so the oil was fairly warm, however when I started the car it had cooled off enough that it was operating in open loop.
It continued to do that for a while, but it got more and more subdued as time went on. I was actually on my way to Advance Auto to get some motor oil for an upcoming oil change. Instead I returned here to go get my camera to take a video for you guys, but by then my OP had returned to normal. It still shifted with rpms, varying between 40-65 psi over a range of 600-2500 rpms. That'* pretty normal for it, I've always had pretty responsive oil pressure, but not 100 psi responsive, lol.
I should have used the video recorder in my phone, but oh well.
5k on Mobil 1 currently. Oil is pretty dark but my OLM hasn't set the change oil soon light yet.
What do you think might be happening here? Dying oil pressure sender? Sludge? My car is becoming sentient?
- S10 - The luxury truck - 4.3 Vortec V6, 68,000 miles, 3.42 gears, leather, wood, sound, HID projectors.