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Old 09-19-2011, 01:41 PM   #1
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Preferred oil and filter for high mileage jeep

Was wondering what you all use and what additives you use if any.

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Old 09-19-2011, 01:44 PM   #2
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I use heavy weight oil like 20w50 cheap oil filter

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Old 09-19-2011, 01:48 PM   #3
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I use 20 50 too 206k on mine.
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Old 09-19-2011, 02:02 PM   #4
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wow thats alota miles have you had much trouble with it. I, actually picking mine up on wednesday and was thinking of giving it an oil change when i get to the house. has anyone used royal purple oil filters before? and 20w50, thats really heavy i have a 2.5 I4 is that right?
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Old 09-19-2011, 02:03 PM   #5
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also the engine is really gunked up and dirty I wanted to clean it up anyone know of anything that works pretty well.
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Old 09-19-2011, 03:02 PM   #6
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200,000 miles on mine...I jus use the cheapest old 5w30 they have at walmart, along with the second cheapest fram filter. Ran it for 8000 miles once without changing, also had a crooked shop DRAIN the oil out of my motor when I was getting a fuel line fixed and I drove it 60 miles before I noticed the guage acting funny......Car still runs like a champ! I challange anyone to prove to me synthetic other any other oil than factory spec makes any difference. The heavy wieght stuff may be a little tougher, but could kill your gas mileage, so pay attention.
...though I am running a straight 6...
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Old 09-19-2011, 07:57 PM   #7
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Originally Posted by UMD_Jesse View Post
200,000 miles on mine...I jus use the cheapest old 5w30 they have at walmart, along with the second cheapest fram filter. Ran it for 8000 miles once without changing, also had a crooked shop DRAIN the oil out of my motor when I was getting a fuel line fixed and I drove it 60 miles before I noticed the guage acting funny......Car still runs like a champ! I challange anyone to prove to me synthetic other any other oil than factory spec makes any difference. The heavy wieght stuff may be a little tougher, but could kill your gas mileage, so pay attention.
...though I am running a straight 6...

Do your homework and fine the difference in group5 sin and all the other so called sins out there.
P.S. I did retire from ExxonMobil this year!
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Old 09-19-2011, 08:45 PM   #8
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Clean the engine with something like Engine Brite, they make a foamy spray that sits on the grease for a while and cuts it really good. Comes out spiffy. Sandwich bags and masking tape works good to cover electric parts, and use a gentle spray to rinse it. And be aware of what's under you, it makes a big oily mess, very environmentally unfriendly. But yeah it does the job well.

I use synthetic 10w40 in my '93 4.0 with 200k. The pressure creeps a little low when it's hot, nothing to worry about but I might try out 20w50 next time. The engine purrs like a kitten though. My oil still looks perfectly clean after 3,000 miles. The PO had been running synthetic only for a long time and it shows.

I also add a 4oz bottle of zinc phosphate additive every oil change. Anybody with an older vehicle should be aware, and most people aren't, that ZDDP was in all engine oils, and been phased out in the recent years. Pretty much all engines now use roller lifters and rockers which are fine without it... ours use old style flat tappets that will will wear themselves and the cam lobes out waaay faster without the zinc. Apparently it can be harmful to your cat, which is why it was removed. I'd rather look out for my engine than worry about the cat, which isn't monitored by the ECM, and in NY we don't test emissions on pre-1996 any more.
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Old 09-23-2011, 09:22 AM   #9
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Do your homework and fine the difference in group5 sin and all the other so called sins out there.
P.S. I did retire from ExxonMobil this year!
huh???
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Old 09-23-2011, 10:16 AM   #10
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Quote:
Originally Posted by UMD_Jesse

huh???
I think he means do research on it. I personally am still out on it. I have heard good and bad and one guy even said he gained mpg with synth.
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Old 09-23-2011, 11:03 AM   #11
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I use Castrol Synthetic Edge 10w40 on my 95 Sahara 4.0 with 198XXX runs like a charm never had any problems besides basic maintenance.
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Old 09-23-2011, 12:28 PM   #12
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Do your homework and fine the difference in group5 sin and all the other so called sins out there.
P.S. I did retire from ExxonMobil this year!
X2.

LOL at the ignorance in this thread.
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Old 09-23-2011, 12:39 PM   #13
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Currently 5W30 reg oil and it has 217000 miles on the engine. Runs great and the pressure is decent.

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