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What affects oil pressure?

1456 Views 6 Replies 6 Participants Last post by  n0alpha, 
Sincity
I only have this car in my possession for the past 3 months. I have observed that sometimes, during idle at a stop light after the engine has warmed up, the gauge reads at 2 and when I drive, it goes back to 3. When I start the car in the am and during idle, the gauge is at 3. Is something "stuck" causing it to be at 2 during idle at the light after the motor is warm? Or is this normal? It also sometimes "twtiches/bounces" back and forth around 2 a couple of times and then settles at 2.

The car had a valve job 18k mi ago. The rings were supposedley (sp?) checked during that time.
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raed_jan said:
Souldn't be at 3 always once you start the engine!!!
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Was that suppose to be a question? ;)
Mine does go to 3 when started then drops to 1/2 or even 1 bar at idle. When I hit the gas it goes back to 3, so I think that's normal. My 560SEL is a 3 no matter if I am at idle or pushing the gas but I think it's a bad oil pressure sensor (sender). My RX7 has a much better oil gauge and is much more sensitive where I can see the oil pressure rise or fall proportionally to my driving.
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