I have a 1982 Mercedes W123 with a 2L gas engine. I have noticed some weirdness with the oil pressure and want to know if this is an indication of a problem.
Let's say I am driving at 60km/h and the engine is hot. The oil pressure sits somewhere between 2 and 3. If I step on the gas, the oil pressure immediately decreases a bit (a noticeable move of the needle, though since I am driving at the time I cannot look at it for longer to determine how much exactly it moved) and then increases as the engine RPM increases. If I release the gas pedal, the oil pressure immediately increases, then decreases as the car slows down.
I I not think I have noticed it before. Is this an indication of some problem or just normal?