Oil pressure
Renix Super Guru
Joined: Mar 2008
Posts: 24,653
Likes: 19
From: In yourz postez fissin jurr spelinzs
Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
Forrest we need a little more info. Is it a 4.0L and if it doesn't vary but the needle stays buried.
Fill out the area on your profile that gives us the info about your Jeep and no one will need to ask you what kind of Jeep and how it is equipped again.
Fill out the area on your profile that gives us the info about your Jeep and no one will need to ask you what kind of Jeep and how it is equipped again.
CF Veteran
Joined: Mar 2009
Posts: 28,068
Likes: 6
From: Tenn. and Mich.
Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
Welcome to CF Forrest! I'm Dan from Tenn. 
My wife's '04 Grand Cherokee w/ 4.7 v-8 ,which we bought new, doesn't have numbers on the oil pressure gauge but is graduated in lines by 1/8ths. Cold at idle the gauge is at 5/8ths. It goes up slightly with RPM's. Warm at idle the gauge is at 1/2, and goes up slightly with RPM's. It's been that way since new. Hope that is of help in some way. I don't know about the 4.0 I-6.
My wife's '04 Grand Cherokee w/ 4.7 v-8 ,which we bought new, doesn't have numbers on the oil pressure gauge but is graduated in lines by 1/8ths. Cold at idle the gauge is at 5/8ths. It goes up slightly with RPM's. Warm at idle the gauge is at 1/2, and goes up slightly with RPM's. It's been that way since new. Hope that is of help in some way. I don't know about the 4.0 I-6.
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