i was just wondering what should the psi of oil pressure be normally??

 

It can vary but as a guide from Mine:

when cold 6 bar on idle coming down to as low as 3 bar when hot on idle

Normal running 4-5 Bar, 6-7 bar when accelerating hard

 

iv just got my car back from the garage after havin the head gasket replaced and sum other things and so the engine had to *** out,wen he put it bk he noticed an oil leak dripping onto the manifold so he sealed it and i got the car back,however after driving the car for 20 mins i noticed smoke from the bonnet and the car cut out 3 times so obviously his seal didnt do the job,car goes back has it fixed again and new rocker cover gasket,i get the car back and all seems well,drives perfect,however i noticed wen fully warmed up the car idles at around 400-600 revs (quite low) but it doesnt stall,and oil pressure is at 2 bar sumtimes slightly less,is it possible i have another oil leak which is causing these problems??