Oil PSI.
#1
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Year: 2001 Sport
Model: Cherokee
Engine: 4.0L 6Cyl
Oil PSI.
When I come to a stop light my PSI drops from 50 driving to 20 idle. Has anyone used Mobile 1's oil? Any increase in PSI? Should I change to a higher weight? Like maybe a 10w40? (Keep in mind Im from Alabama, and the temp is about 100+ daily right now.)
#2
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Year: 1993
Model: Cherokee
Engine: 4.0
How many miles are on your jeep? That doesn't sound bad I believe it's normal to see that kind of pressure from a high mile 4.0. These things are like tractor motors they just keep on plowing along. My pressure runs 40 at a real hot idle and 70 to 80 at high rpms. But I only have a couple thousand miles on a new crate motor so hard to compare. I run shell rotella.
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Year: 1993
Model: Cherokee
Engine: 4.0
The book says 13 psi at idle and 37-75 above 1600 rpm so yours seems within specs. If you are unsure get a mechanical guage and check out the accuracy of your in dash guage.
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#8
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Year: 1999
Model: Cherokee
Engine: 4.0
Oil pressure fluctuation is "normal" between idle and higher rpm.
If you are within the above specs, you are fine. And 20 psi at hot idle is not an issue whatsoever. My 99 has run at about 20 psi at hot idle since the day I drove it off the dealer's lot.
#12
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Year: 1992, 2- 1998 (All 3, 4 Doors)
Model: Cherokee
Engine: 4.0L in all
Old rule: at least 10 psi per 1000 rpm's.
Actual standard: 5-6 psi per 1000 rpm's.
Also, you can find a climate chart in the O. Manual or online that give recommended weights vs. temps operated in.
Actual standard: 5-6 psi per 1000 rpm's.
Also, you can find a climate chart in the O. Manual or online that give recommended weights vs. temps operated in.
#14
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Year: 2001 Sport
Model: Cherokee
Engine: 4.0L 6Cyl
Just got a little worried bc I have a friend with an 01 with 250k on his and he idles at 40