low oil pressure

[eumex]

Howdy. I have a 2009 nissan pixo and the oil light came on.
I topped up the oil, it still didn't go out.
I changed the oil and it still doesn't go out. In addition, some noises and knocks can be heard from the engine, like rockers.

The symptoms are like this:
When I start the engine, everything is ok. Light bulb off, everything normal, nice sound.
I go 4-5 km and the oil light comes on and the sound from the engine starts to appear.
I turn off the engine and start it again. Everything as at the beginning. The light is off, the engine runs fine... after 4-5 km the phase repeats.
So a simple shutdown and restart resets everything.
The car has only 140,000 km. Is it from the oil pump?

[Trevor]

It certainly sounds like the oil is blocking somewhere along the line.

Have you changed the oil filter?
If not then this is more than likely the cause for the symptoms you are describing

[tims]

did changing the oil filter cure the problem?