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From what I understand they are designed to have only 5 psi at idle when hot. I know when I got mine it idled with 45 psi and when cold at 100+ psi. I didn't think much of it until the low oil pressure light started to come on a year later. It dawned on me then that the sending unit was not working. I have since gone to Mobile 1 20w-50, but am going to go back to Mobile 1 10w-30 and see if the oil pressure will remain the same. I also change the pcv valve, its on the back valve cover, I read somewhere if this is leaking it will cause oil pressure to be low. Make sure the little elbow is not broken if it is change, also check the rubber grommet in the valve cover.
Bob
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