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Old 02-10-2010, 07:15 PM   #1
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Excessive oil use!!

My 07 has always used what I think is too much oil in between changes. This has been happening since it was brand new. The oil has always been changed at 3k miles. No leaks are visible and never noticed any being burn't. I usually have to add 2 quarts in between changes. I read on another forum that the oil could just be breaking down. Thats a first for me!! The jeep has less than 40k on her now. Any suggestions would be helpful.

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Old 02-10-2010, 07:18 PM   #2
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You need to take that thing to the dealer. It's not supposed to use any oil at all.
My old 65 Ford Truck doesn't even use that much between changes.

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Old 02-10-2010, 07:32 PM   #3
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That being the obvious. Just wandered if anybody else has had this problem.
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Old 02-10-2010, 07:54 PM   #4
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That being the obvious. Just wandered if anybody else has had this problem.
I have been experiencing what I would call excessive oil usage. I brought it to the attention of the dealer at the last PM 24Kmiles. It has been using approximately a quart every 3K miles on a 6K mile oil change interval (maintaining the warranty). He gave me a page from the Chrysler website that said that up to 1 quart every 1K miles is normal oil consumption. I promptly stapled that to my receipt for the oil change and at this point may have the oil analyzed to see if there is any problem with the engine which is causing this type of consumption. If that comes back with any problems, I go back to the dealer demanding the engine be serviced (or replaced). If the oil is normal, I'm going to continue adding a quart every 3K miles. I did notice on my receipt for this oil change that they put 5W30 in instead of 5W20. Not sure why they did that but they are the ones maintaining my warranty as agent for Chrysler.
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Old 02-10-2010, 08:29 PM   #5
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Obvious or not, you should have asked if anyone was experiencing the problem rather than just stating your issue and and asking for suggestions. I wasn't playing the part of Captain Obvious, I was legitimately trying to help! Don't worry... Won't happen again.

Good luck, and take that thing back to Jeep! My guess is the rings never seated properly.
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Old 02-10-2010, 08:36 PM   #6
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Obvious or not, you should have asked if anyone was experiencing the problem rather than just stating your issue and and asking for suggestions. I wasn't playing the part of Captain Obvious, I was legitimately trying to help! Don't worry... Won't happen again.

Good luck, and take that thing back to Jeep! My guess is the rings never seated properly.
I took mine back and think I got the run-around. If analyzing the oil points out what you said that the rings never seated, they will hopefully correct it by whatever means necessary. Thanks ccain.

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Old 02-10-2010, 09:10 PM   #7
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Apolgy to Mr. Cain. I should have been more specific. I will contact the dealer to hear there opinion.
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Old 02-10-2010, 09:14 PM   #8
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J'KN Let me know if you have your oil analyzed and the results. Thanks
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Old 02-10-2010, 10:06 PM   #9
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J'KN Let me know if you have your oil analyzed and the results. Thanks
Will do, now, if someone could tell me how I go about initializing an oil analyzing test. Is this some thing purchased at an auto-parts store as a kit or done by a local service station?
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Old 02-11-2010, 06:18 AM   #10
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Wow, shame on me. I had gotten out of the habit of checking oil. My 99 t&c (3.8 engine) and my Chevy p.u. have never needed oil between changes. Jeep gets oil change ~3K and after the first few months (and no oil usage) I have gotten lazy. Got to start keeping a better eye on it, I reckon.

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Old 02-11-2010, 06:40 AM   #11
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Will do, now, if someone could tell me how I go about initializing an oil analyzing test. Is this some thing purchased at an auto-parts store as a kit or done by a local service station?
Call These guys and order a kit; they'll tell you what to do. They don't use our lc/mass-specs but I've spoken with the owner of the company and they follow good protocols.
You'll be looking for excessive blow-by contaminants, antifreeze, etc.
You might also want to check for oil in your antifreeze as well.

I've heard of a couple of JKs having this problem; none of them exhibit the classic signs of poor ring alignment or valve guide wear. I'm thinking that it's an internal gasket.
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Old 02-11-2010, 03:52 PM   #12
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I have 17,000 miles on my 2008. I change my oil every 6,000 miles and have never had to add oil. Something is wrong.
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Old 02-11-2010, 05:04 PM   #13
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I have just turned 6K, 2 oil changes and I haven't noticed an issue. Although, My book say's to use 6 qts and the dealer is telling me 5 qts.
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Old 02-11-2010, 09:27 PM   #14
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Mine has the same issue , it now has 50000 miles on it . Its an 07 also . The onlything is behind the main engine pulley there is always a dry oil reisdue , I have taking a mechanics mirror cleaned oil etc , but never seen any signs of a leak , but I read somewheres the 07 oil pan if i remeber correctl metal is porus and it actuallys is cooming thru the metal ? dont know
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Old 02-12-2010, 07:11 AM   #15
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I have just turned 6K, 2 oil changes and I haven't noticed an issue. Although, My book say's to use 6 qts and the dealer is telling me 5 qts.
Errrr, find a new dealer...
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Old 02-12-2010, 07:24 AM   #16
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Errrr, find a new dealer...

I thought about it but the oil level is fine... I brought 6 qrts, they used 5 and the oil level is exact????? I am now monitoring for issues...
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Old 06-24-2010, 11:27 PM   #17
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oil consumption

My 2008 jeep sahara is also using too much oil in between changes, do we have by now an answer to this problem?
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Old 06-25-2010, 12:07 AM   #18
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Ive read on other forums that it is a seal issue. Some are even having blown motors due to no oil.
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Old 06-25-2010, 10:40 AM   #19
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oil use

this oil use is a problem with 3.8 engines and has been for years. my father drove t&c minivans for about 15 years with same problem. His last one, dealer added dye to oil, no sign of leak. All other routine checks found nothing. Chrysler covers themselves by allowing a high oil usage as "normal". His dealer in fl. also changed to heavier wt. oil. Slowed it down some for awhile but not for long. why some 3.8 engines do this and some don't is anyones guess. Logic seems to dictate since many engines hold there oil just fine, it can,t be normal.
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Old 06-25-2010, 01:10 PM   #20
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I thought about it but the oil level is fine... I brought 6 qrts, they used 5 and the oil level is exact????? I am now monitoring for issues...
It takes 6qts. Are they changing your filter?
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Old 06-25-2010, 02:49 PM   #21
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It's not uncommon for the 3.8 to eat oil. This is a common and known issue. However, 2 quarts is too much. My 2 door eats 1/2 quart every 3,000. I run Mobil-1 synthetic 5-20. Generally if your engine eats some oil, a 5-30 is recomended. But since you already run that, it won't do anything lol!

Less than 1 quart burnoff every 3,000 is ok. Offroading, high revs, stop and go traffic, high temps, a heavy foot, viscosity, towing...all play into oil consumption. The more of that you do, the more you'll burnoff. But this shouldn't be a full 2 quarts for 3,000.

Just because your driveway is clean doesn't mean it's not leaking. First I'd pull the plugs and see how those look along with a compression test. That much missing oil is going somewhere and being burned off it shouldn't. You haven't noticed any smoke out the tail pipe or in the bay after a drive? Any strange smells? Loss of power? Misfires or codes? Loss of MPG?

I don't know. Something doesn't sound right to me.

Jk'n and I helped someone a few weeks ago with a similar issue. We basically diagnoised it as the lube shop only putting in 5 quarts. The JK requires a hair under 6, but a full 6 won't hurt anything. Maybe this is what's going on with you too?
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Old 06-25-2010, 03:02 PM   #22
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I wonder if those particular 3.8's run hotter causing the oil to break down faster? Whats a "normal" temp? Is it higher than the standard 190-210 F???
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Old 06-25-2010, 03:10 PM   #23
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Normal temp of mine is 198

EDIT: same temp as my slushbox
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Old 06-25-2010, 03:26 PM   #24
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I have just turned 6K, 2 oil changes and I haven't noticed an issue. Although, My book say's to use 6 qts and the dealer is telling me 5 qts.
Yeah so you have come in more often so they can squeeze more cash out of you. Dealers are thieves when it comes to the general maint. in my opinion. My dealer will only see my Jeep if they need to do something under warranty.

Next week I am doing my diffs. myself. The dealer wants a few hundred $$ for it to be done. I looked up the tutorial on it... thieving dealer!
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Old 06-25-2010, 03:34 PM   #25
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I wonder if those particular 3.8's run hotter causing the oil to break down faster? Whats a "normal" temp? Is it higher than the standard 190-210 F???
Does the standard weather temp have an impact? Because my 09 JKL has never had an oil issue and I am at 22k miles and it can get pretty hot here in the summer.

Though I haven't checked the level in 2 months... maybe I had better start checking it a little more often too.
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Old 06-25-2010, 03:34 PM   #26
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Those diff change prices crack me up.

Pull plug, drink a beer while draining, fill, thanks that'll be $200

insane.

If the timing chain is leaking, I bet you'd never see smoke. If this engine gets 6 quarts, and 2 are missing after only 3,000...it's got to be that or a head gasket or something. That's a ton of oil with no smoke or anything.
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Old 06-25-2010, 03:39 PM   #27
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Does the standard weather temp have an impact? Because my 09 JKL has never had an oil issue and I am at 22k miles and it can get pretty hot here in the summer.

Though I haven't checked the level in 2 months... maybe I had better start checking it a little more often too.
Do what I do...every time you get gas, while the tank is filling check engine oil, battery cables, trans fluid, washer fluid, and peek around the steering shaft and bay for grease or oil or anything. If you spot something, the station has oil, and fluids for you to top off.
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Old 06-25-2010, 03:55 PM   #28
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Do what I do...every time you get gas, while the tank is filling check engine oil, battery cables, trans fluid, washer fluid, and peek around the steering shaft and bay for grease or oil or anything. If you spot something, the station has oil, and fluids for you to top off.
That is actually pretty smart, I've never thought to do that. Makes sense actually... you're filling up one fluid why not check the rest.

On my TJ I once paid the insane price to have the diff done... I am not the smartest when it comes to cars and trucks so I didn't know at the time. After joining this forum though, I have learned a lot! Taking care of my own diffs is one of them!
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Old 06-25-2010, 04:24 PM   #29
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Mine has never used enough to need topping-off at 6000 mile change intervals for 62,000 miles so far.
At least 10,000 of those miles pulling the trailer/anchor.
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Old 07-26-2010, 08:04 PM   #30
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Mine Too.

I have had the same issue, my Jeep becomes a chimming nightmare inbetween oil changes. This has been a problem since 3K. It is a 2007 Unlimited 4x4. I have also had very weird electrical issues and now the wippers will not shut off without pulling the fuse. The first model year was not a good one for Jeep and I love mine, but they sure have a lot to work out. Looking into a newer one, anyone have a newer than 07 with less issues?

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