so I realised that some people have psi oil gauges while others have kg/cm2 gauges and I was wondering what would be the norm for it to be during warm idle?
psi gauges are for usdm cars, while jdm and adm zeds have kg/cm^2. According to the factory manual, anywhere between just above 0 to the halfway line (2kg/cm^2) is acceptable, however the gauges are known not to be the most accurate, and after 20 years there's a fair chance the oil pressure sensor isn't working that great either. It's not uncommon for them to have erratic readings so if yours is acting strange I wouldn't be too worried about it. Best thing to do if you're concerned is to attach an aftermarket oil pressure gauge to get an accurate reading.
Just like any oem pressure/temperature gauge, it's not ment to be accurate, just to indicate the respective fluid is in the system.
