Mine goes staright to 2 immediately upon startup and stays that way at idle, pretty much all the way.
Hit the gas and it goes to 3 until I let up.
I viewed a beat-up 1.8 yesterday at a dealer for my brother and it had only 1.5 at idle.
The engine was leaking oil and shuddering badly.
I believe (I may be wrong) that once the oil pressure drops below 2 bars at idle, it's time for an oil change.
Btw, the oil on mine was just changed 2 months ago.
Hope this helps.