Thicker oil "told" who what, exactly? The OPSU changes resistance based on pressure. The gauge is essentially an ohmmeter. If the connector is poor enough to show lower pressure than it really is, and you add ridiculously viscous oil, it's going to display a "normal" value, and all you've done is increase wear and parasitic drag.

What the hell is your brother accomplishing running 20W50?

 

Harder cold starts and increased wear on dry starts. Win win!

 

Not a significant enough amount to be concerned. What thicker oil does though is it counters motor chatter. Chatter is from metal hitting metal.

 

Low oil pressure accompanies noise. Throw the oil pressure gauge out. Its an idiot light anyways.

 

If your engine has low enough pressure that there is noise. This means oil is failing to reach these noisy parts. Thicker oil fills the loose tolerances and allows significant pressure for the oil to reach the noisy parts.

Noisy parts wear out quicker, cause little nasty metal shavings, etc....

The pressure gauge is just entertainment.

Your motor can not run uber quiet with no oil pressure.

Its not rocket science, I have a degree in that.

 

Last time I checked, oil pressure is caused by bearings. But hey, thicker oil weight is just a cover up. Your brother might as well run a chip while he's at it. Take your ball please...

 

A chip changes your mapping.

thicker oil Closes loose clearances allowing more oil to reach needed areas. Where as thinner oil bleeds off too quickly because of loose clearances and does not reach in sufficient amounts certain areas of the motor causing motor chatter. Which is a recipe for disaster.

 

Wow. That's all you get is a wow. I really hope you don't have a certification in anything automotive related and you're just spewing ignorance. Like I said, please take your ball.

To the op, use a mechanical gauge to check your oil pressure. If it truly is low, then look at your bearings because worn out bearings are the cause of low oil pressure not oil weight. Oil weight is a mask for bad bearings and is a crutch.

 

The reason there is more pressure to thicker oil is because it ISN'T flowing. It is a RESISTANCE to flow. When you use thicker oil LESS oil gets into areas. The engine is lubricated and cooled by oil flowing quickly through parts. With super thick oil, less lubricant gets into areas that need it and it spends way more time there than necessary, getting hotter and more degraded. Which is a recipe for disaster.

 

Not in a worn out motor. Which is what we are talking about.

 

Salad, just leave it alone. He won't learn. Just direct your comments to the op to save everyone a headache

 

That is all I get because you have no experience in the mater. But its the net,you are free to say whatever you want

I have built well over a hundred race motors. Two this week. Not an expert, but I understand lubrication pretty well and the repercussions of it.

Admittedly only one Cherokee motor though.

These philosophies are only hard if you are relying on the internet for your arguments. In real life its common knowledge.

 

Yeah I already sent him to a real thread in post #5 that has an actual technical aspect in it. I'm just bored now. lol

 

So if we are talking about a worn out motor... Then the bearings are most likely shot reducing oil pressure. Thicker oil will cover the problem up like salad said. I mean you must know a lot in general too. Didn't you say lockers were bad and pointless an then now run one anyways? Didn't you want to cut holes in your frame to make the XJ lighter? I mean there's a difference between experience and thinking you know what you're doing. All you have is the latter. Next you're gonna preach that oil pumps create pressure too. Tata. The pleasure has been all yours. End your pissing contest and zip up your pants. Sean Penn, please stop.

Op. Like I said. Put a mechanical gauge in and look at the pressures then report back. Like I said, bad bearings or a faulty dash gauge or even sender.

 

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.