Oil pressure min with hot engine at 2000rpm is 1.6bar. That's min tho, a good engine should be giving around 3bar lowest at 2000, upto 4+ higher up. Unless totally knackered, the oil pressure at cold start will be off the guage, over 5bar. This is due to the thickness of the oil when cold. At idle when warm you should have around 1.5bar - 2bar if the engines in good nick. If oil temp over 130degrees, like after a run, it may drop to just over 1.2 ish.
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