What should oil pressure be?
07-01-2014, 01:18 PM
#76
CF Veteran
My wife's '96 Blazer reads almost the same as the XJ. I've got a mechanical set up sitting in the garage (good place for it). I should hook it up.
07-01-2014, 01:20 PM
#77
Beach Bum
Higher with Rotella 15-40.
However, it's about flow and not pressure.
To be sure it's flowing, use a flashlight and look in the valve cover.
07-07-2014, 12:54 PM
#78
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Year: 1996
Model: Cherokee
Engine: 4.0L
I replaced my oil pressure sending unit and it did change the readings slight but not drastically. Now I read around 40psi while driving and around 20psi at idle. Just thought I would give you guys an update.
07-07-2014, 03:08 PM
#79
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Yeah, young people don't realize 30 wt was the only option way back when. I remember building fires under the oil pan in the winter to thin the oil enough to turn over. Engines in cold climates were wearing out in 60k miles b/c they were not getting lubricated. Trying to raise oil pressure is meaningless anyway. Low pressure does not indicate a lubrication problem...it indicates a WEAR problem and no amount of oil pressure is going to rectify that!
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