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What should the oil pressure be for a 4.0 at idle? I just recently noticed that it's at the "quarter" line when she's at idle and that concerns me. Thanks!
 

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If you have 10 lb or more at idle your fine. Stock guage is pretty vague, best bet is to T in an analog guage under the hood with the factory sending unit so you have a real reference to actual pressure.
 
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