oil gage pressure immediately goes high
i have a 1993 190E - my oil pressure gauge always sits on 3. ==New Answer Haedline == The oil pressure gauge actually moves but is related to several factors Engine Temprature Oil viscosity Engine speed. When you start you car the engine temperature is low the gauge goes to 3, after a long drive/travel and if your temp gets to 80C then with an engine speed of 750-800 RPM you oil pressure gauge will read about 1.5. if you rev. the engine the pressure gauge goes up to 3
You would need a gauge that taps into where sender goes on block.
If you are talking about at startup, this is normal. If you are talking about after startup, then either you are low of oil, defective or incorrect filter, have a defective oil pump, oil sending unit, or bad gage.
The oil gauge shows the oil's temperature. The oil pressure gauge monitors the oil pressure for your viewing pleasure.
Hopefully (for you) just a bad oil pressure sending unit Install a manual gauge to actually check the vehicle's oil pressure
it leaks oil
you have a big problem
If you have the correct weight oil in the engine, it sounds like the engine may be worn. If you haven't checked the oil pressure with a manual gauge (vs the dash gauge) that is a good place to start to verify that it is not a gauge/sensor problem.
Waht is the answer?
Your oil pressure goes up with more throttle (higher rpm) and there is less pressure say at idle. Therefore your gauge reading will vary according to the throttle/rpm.
A mechanical oil gauge may bounce if you are low on oil. An electric oil gauge may bounce if the sending unit or the gauge itself is faulty and of course you are low on oil.