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Old 12-12-2012, 09:57 AM   #1
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Burning oil

I have an 09 four door and I'm burning a qt of oil in less then a month what could it be?

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Old 12-12-2012, 10:25 AM   #2
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There could be many causes.
First, is your Jeep smoking (blue smoke out of exhaust)? If yes, is it more intense when accelerating or decelerating?
How many miles?
Being 2009 it's fairly new, so it's very unlikely that it is a wear issue. Most likely your problem is limited to one cylinder. It could be a broken ring or a defective valve guide. You can identify the faulty cylinder by pulling out the spark plugs. If one (or more) are visibly more dirty than the rest, this(these) cylinder(s) is(are) the one leaking oil. Once you have identified the bad cylinder, you need to remove the head and check the valves. If the valve guides / seals are OK, then you need to fully disassemble the engine and get the pistons out.
If spark plugs are clean and there is no smoke, then most likely you have a leak, not an oil burning problem.
In any case you should still be covered under the powertrain warranty.

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Old 12-12-2012, 10:30 AM   #3
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Old 12-12-2012, 11:46 AM   #4
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Ya I just found that out thanks
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Old 12-12-2012, 12:03 PM   #5
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I was burning roughly 1 quart for every three thousand miles. I was also getting engine knock with 87 octane gas. After running three tanks of super with Techron, and getting on the throttle a bit more here-and-there, it seems that both problems have been cured. Not sure how they all connect, but it was advice I received here that worked.

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Old 12-12-2012, 12:57 PM   #6
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Yes, a lot of 3.8L eat oil with no visible leaks or smoke.....Make sure you carry a couple quarts with you and chk your dip stick weekly or sooner if you drive daily.
Lots of threads about this if you do a search or just look thru the pages here. It is also noted in the Mini van forums. causes are thought to be, but not limited to....:
1) Piston rings installed up side down in Mexico (Engine plant)
2) leaking intake manifold gasket (Internal)
3) Stuck PCV valve
4) Carbon fouled piston rings
Some supposedly have "fixed" the problem by using SEA FOAM in the intake system to "De-Carbon" the piston rings . Read the instructions at Sea foam sales.com.
Some have replaced the PCV valve with a different part number ( this was later found to be only a temp. fix.)
Some have "fixed" the problem by using Synthetic motor oil..
Good luck with yours !! Check your oil and keep some on hand...
I just changed mine today, 40K miles, and I have reduced the oil consumption quite a bit by using the High Milage engine oils.... 10W-30 .. "BH"
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Old 12-12-2012, 11:39 PM   #7
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The jeep burned dam near all the oil in 3000 miles went to do an routine oil change and there was dam near nothing in there
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Old 12-13-2012, 05:24 AM   #8
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I had the same problem. 07 with 3.8 using 6 quarts in 3000 miles. Went to dealer and had oil consumption test done for two oil changes. Dealer decided to swap out engine. Now it uses no oil.
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Old 12-14-2012, 12:09 AM   #9
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Ya just called them that's what there going to do thanks guy

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