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Unread 06-20-2012, 02:40 PM   #1
TJSunny1
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2001 TJ Wrangler 
 
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Heavyweight oil for my 2001?

So I have a 2001 with what I think is low oil pressure. At hot idle its at about 12psi and at 1300 RPM its at about 35 psi. What concerns me is when I do a hot start, it takes up to 7 or 8 seconds to create pressure and the check gauges light comes on.

I guess I have two questions: Is this normal? Would putting a heavier oil in help the problem?

I run 10w30 right now.

Thanks!

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Unread 06-20-2012, 03:10 PM   #2
lwszabo
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Heavier oil is not a good idea. The vehicle was designed for a certain oil and that's what it needs. You need to find out what the problem is and not try to mask it. Start with the cheaper stuff like sending units etc...good luck!
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Unread 06-20-2012, 03:39 PM   #3
danb303
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How many miles?

Typical signs of worn bearings. I would go to a little thicker oil and give that a shot. Lots of people go to Rotella. Trying a new sending unit might be worth the $

I would try the Valvoline Racing oil VR-1. My brother swears by it, says it has quitened his down a lot.

Make sure you are using a good filter... I run Wix. I had an issue with a Mopar filter and haven't used one since
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Unread 06-20-2012, 05:20 PM   #4
lwszabo
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Quote:
Originally Posted by danb303
How many miles?

Typical signs of worn bearings. I would go to a little thicker oil and give that a shot. Lots of people go to Rotella. Trying a new sending unit might be worth the $

I would try the Valvoline Racing oil VR-1. My brother swears by it, says it has quitened his down a lot.

Make sure you are using a good filter... I run Wix. I had an issue with a Mopar filter and haven't used one since
Wix makes Mopar filters!
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Unread 06-20-2012, 05:29 PM   #5
BioTex
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Install a mechanical guage so you are taking a lot of guess work out of the diagnosis. Then report back what your "real" pressures are.
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Unread 06-20-2012, 05:30 PM   #6
lwszabo
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Quote:
Originally Posted by lwszabo

Wix makes Mopar filters!
Sorry I was wrong. Purolator makes Mopar
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Unread 06-20-2012, 06:28 PM   #7
TJSunny1
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oh sorry. its got 127,XXX on the clock. And.....uhhh...a mysterious coolant leak..... But my oil shows no signs of contamination. Im gonna send a sample to blackstone though.
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Unread 06-20-2012, 06:33 PM   #8
BamaJeepman21
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Quote:
Originally Posted by danb303 View Post
How many miles?

Typical signs of worn bearings. I would go to a little thicker oil and give that a shot. Lots of people go to Rotella. Trying a new sending unit might be worth the $

I would try the Valvoline Racing oil VR-1. My brother swears by it, says it has quitened his down a lot.

Make sure you are using a good filter... I run Wix. I had an issue with a Mopar filter and haven't used one since
Are bearings easy to replace or is it a major overhaul?
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Unread 06-20-2012, 07:21 PM   #9
VietVet67
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YES to the above try 20-40 and see if that helps at that mileage it won't hurt the engine maybe mileage a little--I run 15/40 in mine in Arizona all the time at 30K miles
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Unread 06-20-2012, 10:11 PM   #10
appfire
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Quote:
Originally Posted by TJSunny1 View Post
oh sorry. its got 127,XXX on the clock. And.....uhhh...a mysterious coolant leak..... But my oil shows no signs of contamination. Im gonna send a sample to blackstone though.
My '98 is doing the exact same thing. 2.5 motor with No noise or rattleing in the motor, low oil pressure after the motor warms up. Mechanical guage shows the same pressure as the factory guage. Small coolant leak, no signs anywhere. Used some castrol 20w50 for a few days and did not really make much difference in the pressure when it warmed up. Also used some gunk motor flush and that also did not make any difference. I am assuming worn bearings. Anybody else have any other ideas?

Chris
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Unread 06-21-2012, 07:54 AM   #11
danb303
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Replacing the bearings is a major project.

What temp does your jeep run at?

If you can stay around 12-15 psi when hot then I wouldn't worry about it. LOTS of jeeps are riding around with the oil pressure that low... and LOTS of jeeps are running Rotella for that exact reason.
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Unread 06-21-2012, 01:54 PM   #12
appfire
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Temp is normal, always just below the 210 mark when fully hot. Its never overheated. I add maybe a cup of antifreeze every other week. When the motor is fully hot, the pressure guage will be around 15-18 psi driving 55mph down the road.

Chris
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Unread 06-21-2012, 01:55 PM   #13
appfire
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Is rotella that much safer or better? What weight?

Chris
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Unread 06-21-2012, 02:01 PM   #14
JBTJ
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Quote:
Originally Posted by appfire View Post
Is rotella that much safer or better? What weight?

Chris
No, it's no better than any other quality motor oil.
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Unread 06-21-2012, 02:20 PM   #15
danb303
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It's just a HD 15w 40 motor oil. And its a quality motor oil. I don't use it but if I had one that was getting that close to 10 psi I certianly would try it. It's only around 14 bucks a gallon. Give it a shot
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4.0 , check gauges , low oil pressure , oil , psi

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