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Old February 8th, 2013, 09:40 PM   #21
Rob the plumber
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I AGREE! (In Obama voice)
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Old February 9th, 2013, 12:10 AM   #22
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http://www.nordicgroup.us/oil.htm#5W30%20versus%2010W30

My oil cap says 5w-30.

Oil is much different than it was even 10-12 years ago...that engine is ancient....and if I ran a stroker probably would not run lighter weight oil either.

Just reporting what I have experienced.
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Old February 9th, 2013, 12:17 AM   #23
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Will a block heater help?

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Old February 9th, 2013, 10:52 AM   #24
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Quote:
Originally Posted by toolmantim View Post
http://www.nordicgroup.us/oil.htm#5W30%20versus%2010W30

My oil cap says 5w-30.

Oil is much different than it was even 10-12 years ago...that engine is ancient....and if I ran a stroker probably would not run lighter weight oil either.

Just reporting what I have experienced.
Yes todays oils absolutly suck compared to old oils. Todays oils are formulated for maximum profit, maximum mpg, and minimal polutents. Todays oils are made for roller cam motors and have almost no zinc or phosphate in them. You know, the stuff that keeps stuff lubricated.

The 5w30 on your oil cap was put there buy a engineer trying to make a very old motor pass the tailpipe sniffer, not because he thinks it's the best thing for your jeep motor.

Their are no real differences between my stroker and a stock 4.0 when it comes to what oil will make them last the longest. You just need a oil with enough zddp.
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Old February 9th, 2013, 10:53 AM   #25
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Will a block heater help?

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It might, and it will be easier on your cyl walls and other things in your motor on cold startups.
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Old February 9th, 2013, 11:20 AM   #26
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X157447 on the zinc, Zinc is your friend that is basically what most engine oil additives like z-max are
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Old February 10th, 2013, 02:30 PM   #27
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Is rotella still using zddp?

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Old February 10th, 2013, 04:43 PM   #28
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Is rotella still using zddp?

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I think my dad stopped using it because they don't use it anymore
He used to swear by that stuff
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Old February 10th, 2013, 06:16 PM   #29
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Quote:
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Is rotella still using zddp?

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Most oils use some zddp, just not enough for our old motors. Rotella was one of the last to use large anounts of it in their 15w40. That ended and the additives used in rotella now are geared more to work with the low sulfer diesels better.

I have studdied oil quite a bit lately after building a few fresh motors and still dont now what the best way to go is. I know you have to be very carefull with oil additives. Zinc needs phosfate to work and their is a correct amount of each for best results.

I run brad penn in every thing I own after hours and hours of reading.
I think everyone who has a old tecnology motor should spend some time studying new oils so they know what they are putting in there motor.

The one good thing is stock jeep inline motors have almost no valve spring pressure and are very easy on the valve train.
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Old February 10th, 2013, 07:37 PM   #30
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to learn about oils google "bobistheoilguy"

the brad penn oils are supposed to be very good.
i personally use mobil 1 0w40 tdt oil in my 4.0L.
it is a european spec oil for new small displacement diesels.
it is one of the higher zddp content oils commonly available.
i have used valvoline vr1 10w30 when i could not get my first choice.
currently doing 10k mile oil changes with a wix premium filter.
oil looks remarkably clean and golden at 10k still.

some people think this is all bs, and run what ever is on sale.
none of the new diesel oils are high in zddp any longer.

i ran 15w40 diesel oil in my first wranger, had no issues in over 110k miles.
it was still running well long after i sold it.
you could run any quality oil and use a zddp additive also.
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Old February 11th, 2013, 06:22 PM   #31
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How come my 192,000 mile motor makes zero noises and my 140,000 one makes lots of noises.

So much expert in this thread I am sure I can fix it in no time!
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Old February 11th, 2013, 06:34 PM   #32
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How come my 192,000 mile motor makes zero noises and my 140,000 one makes lots of noises.

So much expert in this thread I am sure I can fix it in no time!
Have you checked the gender of each one?
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Old February 11th, 2013, 07:06 PM   #33
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Have you checked the gender of each one?
I think the higher mileage one is a girl (it says Miss XJ on it) The lower high mileage one is most likely male. It smells very manly inside.

The girl one should not be the quiet one in my opinion, that's why I am confused.
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Old February 11th, 2013, 09:41 PM   #34
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How come my 192,000 mile motor makes zero noises and my 140,000 one makes lots of noises.

So much expert in this thread I am sure I can fix it in no time!
What year are the motors?

The 4.0 was discontinued after 06 because the molds were worn out after such a long production run. The later motors, 04 and later really had a lot of cam shaft to dist clearence problems. The newer the motor, the looser clearences will be.

Motors also used different suppliers for parts like pistons and lifters.
A piston might be on the small side of acceptable tolerences, and the hole it goes in may be on the large side. You end up with a noisey motor that will run for years.

90% of all aftermarket lifters for the jeep inline are too small if you measure them. Many people put new lifters in to quiet a motor down and end up noisier then before they started.
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Old February 23rd, 2013, 09:42 AM   #35
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http://www.wranglerforum.com/f5/cam-...ing-52662.html


gonna replace my cam shaft position synchronizer early next week along with a few other things. I hope that will help with the tick in my 04 LJ.
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