Ideal oil pressure
Seasoned Member
Joined: Sep 2009
Posts: 273
Likes: 1
From: Coventry, CT
Year: 2000
Model: Cherokee
Engine: 4.0 high output, Alabama Cylinder head, 60mm bored TB
Service manual specs 13 psi as being the minimum at hot idle.
When I first start mine, it idles at 50, and stays around 60 while driving.
When hot, it idles between 15-20 and when at speed is at 50 psi.
10w30 Mobil 1 high mileage and Mopar filter.
I ran Rotella T synthetic 5w40 once just to try it and my pressure was much higher. Hot idle was 35, and driving was 60. When cold I had 55 psi idle, and 65-70 while driving.
When I first start mine, it idles at 50, and stays around 60 while driving.
When hot, it idles between 15-20 and when at speed is at 50 psi.
10w30 Mobil 1 high mileage and Mopar filter.
I ran Rotella T synthetic 5w40 once just to try it and my pressure was much higher. Hot idle was 35, and driving was 60. When cold I had 55 psi idle, and 65-70 while driving.
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