Oil Pressure
CF Veteran
Joined: Aug 2010
Posts: 8,387
Likes: 1
From: The Florida State University
Year: 2001
Model: Cherokee
Engine: I-6 4.0 L
Salad compared a chip (as in useless) to thicker oil. Which is wrong. Thicker oil can help a worn motor. As for the highlighted. You made this up. You are trolling because you have no argument, or experience. I said lockers were not needed to have fun wheeling, and I have no idea where you came up with the latter? LOL Imagine if it were possible that all posts must be questions unless you have professional experience on the subject. You would not be posting at all would you? I am willing to bet you have never even held an oil pump in your hand. Probably a bottle of oil, but that is it. All I can say is you enjoy your internet freedom where no one checks your actual experience on the matter. This discussion has ran its course. I just hope that those lurking are wise enough to separate the ideas given and take in the ones that may help them. All the best.
Last edited by cf1k1; Oct 19, 2013 at 02:03 PM.
You clearly have no reading skills. Additionally, you stated all that about 6 months ago. Frankly no one needs to check my internet experience. I'm trying to show people the idiocy you come up with which you have already proven. Ask around, I don't need to show credentials to prove myself. I think I might be a tad more respected around here than you.
Hell no!! We know you have that! LOL That was my point.
Have a great day. I am back to motor work unfortunately. My shop is week nights and weekends. 4x4 shop week days. Yes I dont have much of a life now except 80+ hrs of work every week. But I am single so may as well.
Don't take anything personal here. Opinions vary, they always will.
CF Veteran
Joined: Aug 2010
Posts: 8,387
Likes: 1
From: The Florida State University
Year: 2001
Model: Cherokee
Engine: I-6 4.0 L
Hell no!! We know you have that! LOL That was my point. Have a great day. I am back to motor work unfortunately. My shop is week nights and weekends. 4x4 shop week days. Yes I dont have much of a life now except 80+ hrs of work every week. But I am single so may as well. Don't take anything personal here. Opinions vary, they always will.
Senior Member
Joined: Jul 2012
Posts: 503
Likes: 0
From: North West Ohio
Year: 2000
Model: Cherokee
Engine: 4.0 liter in-line six
The scary thing is, guys who are here to LEARN won't know what to believe. To anyone wondering- salad and cf1k1 are correct. Holycaveman- not even close. Pumps do not create pressure. Pumps create FLOW. Restriction to flow creates PRESSURE. Remember those old tire pumps that were like pogo sticks? You could work the handle up and down all day, but if you kinked the hose, it got hard to pump right away. The reason for this is that the kink was a restriction, and pressure was created on account of this.
As far as heavier motor oil goes-
Heavier oil is NOT going to fill a worn out engine like holycaveman claims. the viscosity is lower, and this means it has lower resistance to flow, which, as salad says, isn't going to fill the gaps and will wear out quicker.
Even if it DID do as holycaveman suggests, all that it would be doing is limping an engine along that REALLY needs rebuilding, and with every mile, you increase the chance of catastrophic failure and an even larger parts bill.
I don't claim to be an expert like holycaveman CLAIMS he is. However, I did pay attention in my college engines class.
As far as heavier motor oil goes-
Heavier oil is NOT going to fill a worn out engine like holycaveman claims. the viscosity is lower, and this means it has lower resistance to flow, which, as salad says, isn't going to fill the gaps and will wear out quicker.
Even if it DID do as holycaveman suggests, all that it would be doing is limping an engine along that REALLY needs rebuilding, and with every mile, you increase the chance of catastrophic failure and an even larger parts bill.
I don't claim to be an expert like holycaveman CLAIMS he is. However, I did pay attention in my college engines class.
The scary thing is, guys who are here to LEARN won't know what to believe. To anyone wondering- salad and cf1k1 are correct. Holycaveman- not even close. Pumps do not create pressure. Pumps create FLOW. Restriction to flow creates PRESSURE. Remember those old tire pumps that were like pogo sticks? You could work the handle up and down all day, but if you kinked the hose, it got hard to pump right away. The reason for this is that the kink was a restriction, and pressure was created on account of this.
As far as heavier motor oil goes-
Heavier oil is NOT going to fill a worn out engine like holycaveman claims. the viscosity is lower, and this means it has lower resistance to flow, which, as salad says, isn't going to fill the gaps and will wear out quicker.
Even if it DID do as holycaveman suggests, all that it would be doing is limping an engine along that REALLY needs rebuilding, and with every mile, you increase the chance of catastrophic failure and an even larger parts bill.
I don't claim to be an expert like holycaveman CLAIMS he is. However, I did pay attention in my college engines class.
As far as heavier motor oil goes-
Heavier oil is NOT going to fill a worn out engine like holycaveman claims. the viscosity is lower, and this means it has lower resistance to flow, which, as salad says, isn't going to fill the gaps and will wear out quicker.
Even if it DID do as holycaveman suggests, all that it would be doing is limping an engine along that REALLY needs rebuilding, and with every mile, you increase the chance of catastrophic failure and an even larger parts bill.
I don't claim to be an expert like holycaveman CLAIMS he is. However, I did pay attention in my college engines class.
Glad you could clear it up for everyone. Another person with absolutely no experience. Sad really that experience is not a qualification for the internet.
I just hope people are wise enough to separate the truth from the falsities.
Fortunately for you and others in here you dont have to make a living at it. You have no repercussions for your wrong information. If I do it wrong at work, I have to pay for it. Big difference.
About your rebuttal, its just a troll, your comments do not even pertain to the discussion. Anyone with any sense can see that. You are just choosing sides, that is all. Full of information with no understanding. I see this so much these days.
Edit: Kind of getting tired of this really. I try to be nice, but damn this is pushing it. First off your rebuttal is completely wrong. I never said the oil pump produced pressure.
Its evident from your post you have no idea at all what you are talking about. Yet you are damn sure you about arguing about it. What the heck, do you like just causing problems?
Its fine to diss agree with someone, we all do that. But to go to the extent that you guys do to make another person look bad who is actually trying to help is just being a complete A$$. I am not a know it all. There is tons of threads I stay out of because I DONT HAVE ANY EXPERIENCE IN THE MATTTER. So I shut my pie hole.
You guys carry on an argument like you know whats going on whether you heard it as a rumor, read it in a tabloid, or thought there was a college class about it. Frankly I am amazed at the amount of A H*^&$ on the internet. NEVER in my life have I found such people!
Fortunately I have met many very nice individuals on the net. So I know its not everyone.
All I can suggest is to grow up, speak from experience and not rumors and hear say. And you will find few to argue with.
Last edited by holycaveman; Oct 19, 2013 at 08:56 PM.
Senior Member
Joined: Jul 2012
Posts: 503
Likes: 0
From: North West Ohio
Year: 2000
Model: Cherokee
Engine: 4.0 liter in-line six
Glad you could clear it up for everyone. Another person with absolutely no experience. Sad really that experience is not a qualification for the internet.
I just hope people are wise enough to separate the truth from the falsities.
Fortunately for you and others in here you dont have to make a living at it. You have no repercussions for your wrong information. If I do it wrong at work, I have to pay for it. Big difference.
About your rebuttal, its just a troll, your comments do not even pertain to the discussion. Anyone with any sense can see that. You are just choosing sides, that is all. Full of information with no understanding. I see this so much these days.
All the best.
I just hope people are wise enough to separate the truth from the falsities.
Fortunately for you and others in here you dont have to make a living at it. You have no repercussions for your wrong information. If I do it wrong at work, I have to pay for it. Big difference.
About your rebuttal, its just a troll, your comments do not even pertain to the discussion. Anyone with any sense can see that. You are just choosing sides, that is all. Full of information with no understanding. I see this so much these days.
All the best.
1. they started closing branch dealerships and shuffling people around. Unfortunately, since I was low man on the pole, I got lost in the shuffle and suddenly- no more room for me. Or so it was explained to me by my service manager, anyway.
Also.. I paid attention in my engines and hydraulics classes. Its true, they weren't an advanced engine performance class- that would have been this semester. But when it comes to this, I know enough to know what I'm talking about. This is very basic stuff.
Also- I would like to correct an intentional error in a statement I made earlier. In heavier engine oils, the viscosity is HIGHER- meaning it has a greater resistance to flow. You know, for someone who bulds race motors, it seems like you would have caught that.
Junior Member
Joined: Oct 2013
Posts: 43
Likes: 0
From: Connecticut
Year: 2002
Model: Grand Cherokee
Engine: 4.0L i6 PowerTech
So I have an oil pressure question also. I recently changed my oil, used a wix filter and Royal Purple 5w30, and while driving my pressure is at the line after the middle line. While idling or at a stop, it's at the halfway line. I honestly have no idea what it should be at. Any help? It runs fine and isles fine though. I think it's where it should be
So I have an oil pressure question also. I recently changed my oil, used a wix filter and Royal Purple 5w30, and while driving my pressure is at the line after the middle line. While idling or at a stop, it's at the halfway line. I honestly have no idea what it should be at. Any help? It runs fine and isles fine though. I think it's where it should be
Heck no, its not a pedestal. Its among a common knowledge from people with experience that make their current living from it.
For some reason on the net every little miniscule idea or comment becomes an argument. Sad, very sad.
And shame on me for even entertaining an argument with those who have no real knowledge of the subject. I should have not replied to them at all.
But I did so I am to blame as much as anyone.
ACTUALLY... I worked at a John Deere dealer for about a year. I was damn good at my job, and was working my way through college. There is only one reason I'm not still there.
1. they started closing branch dealerships and shuffling people around. Unfortunately, since I was low man on the pole, I got lost in the shuffle and suddenly- no more room for me. Or so it was explained to me by my service manager, anyway.
Also.. I paid attention in my engines and hydraulics classes. Its true, they weren't an advanced engine performance class- that would have been this semester. But when it comes to this, I know enough to know what I'm talking about. This is very basic stuff.
Also- I would like to correct an intentional error in a statement I made earlier. In heavier engine oils, the viscosity is HIGHER- meaning it has a greater resistance to flow. You know, for someone who bulds race motors, it seems like you would have caught that.
1. they started closing branch dealerships and shuffling people around. Unfortunately, since I was low man on the pole, I got lost in the shuffle and suddenly- no more room for me. Or so it was explained to me by my service manager, anyway.
Also.. I paid attention in my engines and hydraulics classes. Its true, they weren't an advanced engine performance class- that would have been this semester. But when it comes to this, I know enough to know what I'm talking about. This is very basic stuff.
Also- I would like to correct an intentional error in a statement I made earlier. In heavier engine oils, the viscosity is HIGHER- meaning it has a greater resistance to flow. You know, for someone who bulds race motors, it seems like you would have caught that.

All I said was in a worn out motor thicker oil can aid in keeping the chatter and the potential for more motor wear down.
Its not such a huge deal. What I said is true, without a doubt. That is all I said. I run 5/30 motor oil in my cherokee, 20/50 in my race bike, and 10/40 in the street bike.
So we have had 3 pages of bickering because a guy said this? Talk about boredom.........
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
So I have an oil pressure question also. I recently changed my oil, used a wix filter and Royal Purple 5w30, and while driving my pressure is at the line after the middle line. While idling or at a stop, it's at the halfway line. I honestly have no idea what it should be at. Any help? It runs fine and isles fine though. I think it's where it should be


