what should the 4.2 oil pressure be

 

40-60 psi at 2500 rpm,engine hot
no less then 15-20 psi at idle

 

hi, i have run a oil pressure gauge for 1 year and it confirms that the oil pump being gear driven changes with the revs and is not at a constant. idle as low as 10psi hot and 65psi cold at anything above 2700revs. anything below 7psi the oil light comes on and thats spells trouble.

 

thats what it is hot about 15 idle