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Old 04-05-2016, 02:19 PM
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3.8 losing oil HELP

I have a 2011 JK, with 3.8L motor (55,7k miles). The past two oil changes it was 2 quarts low and only drove around 2000~ miles. There is no sign of an oil leak. No smoking, and no significant noises?? Runs good. Has anyone else had any similar issues?

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Old 04-05-2016, 02:26 PM   #2
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I thought the 3.6L motor started in the 2012 Jeep Wranglers?

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Old 04-05-2016, 02:29 PM   #3
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I thought the 3.6L motor started in the 2012 Jeep Wranglers?
Correct. A 2011 would have the 3.8l engine.
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Old 04-05-2016, 02:32 PM
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You are both correct It is a 3.8 a am posting this for a friend who typed in the wrong info .OOPS
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Old 04-05-2016, 02:34 PM
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2011 3.8l LOOSING OIL HELP

I have a friend that has a 2011 JK, with 3.8L motor (55,7k miles). The past two oil changes it was 2 quarts low and only drove around 2000~ miles. There is no sign of an oil leak. No smoking, and no significant noises?? Runs good. Has anyone else had any similar issues?
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Old 04-05-2016, 02:58 PM   #6
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The 3.8l engines have been known to use oil excessively in many cases
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Old 04-05-2016, 03:03 PM
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Yes I read that this has been a problem. But has anyone determined a source or remedied this problem??
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Old 04-05-2016, 03:11 PM   #8
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My 2008 JKU with the 3.8 was burning 1qt every 1,000 miles. I changed the PCV valve and went with 10-30 weight oil and it dropped to 1qt every 1,500 miles.

Not much else to do other than live with it I'm afraid.
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Old 04-05-2016, 03:15 PM   #9
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It is the in assembly itself. The rings are aligned incorrectly. The oil is blowing by the rings and what enters the system is burning off in the cat. Mopar never owned up to it. The only thing is a re-build or a re=jeep.

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Old 04-05-2016, 05:06 PM   #10
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A JK with 50K plus miles Chrysler won't cover it as long as it's "only" burning 1 qt. in 750 miles. Replacing the PCV and switching to at least 5w30 might help. Other than that, X2 with bronco.
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Old 04-05-2016, 06:46 PM   #11
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piston rings and/or the engine's valve seals may be worn....
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Old 04-05-2016, 07:56 PM   #12
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Quote:
Originally Posted by jeeptank91 View Post
You are both correct It is a 3.8 a am posting this for a friend who typed in the wrong info .OOPS
The typo now shows 3.8!

As for your oil usage, try changing your PCV valve. I don't know what weight oil that you are using, but if 5W20, try 5W30.

I would also check your air filter and the air induction system, to make sure that your engine isn't digestion dirt.
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Old 04-05-2016, 08:29 PM   #13
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Quote:
Originally Posted by nwbronco View Post
It is the in assembly itself. The rings are aligned incorrectly. The oil is blowing by the rings and what enters the system is burning off in the cat. Mopar never owned up to it. The only thing is a re-build or a re=jeep.

Bob
This was the option I had to settle for recently. My 2011 only had 60k on it, but I was tired of worrying whether I was going to get stuck paying for a re-build. Mine was burning around 1q/1,000 miles as well - which I felt was too much and indicated something was wrong. Pretty sure there was a very lengthy thread on here about this issue.
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Old 04-05-2016, 09:29 PM   #14
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There were two Threads in this JK Tech Forum on the same subject started by the same OP.

So they have now been merged together so that all of the response Posts can still be read!
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Old 04-06-2016, 12:05 PM   #15
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My 2007 runs through 1qt every 1000 miles as well. Irritating but not surprising. I suspect that my CATs are plugged due to the amount of oil that's been blown into them. I also seem to wear O2 sensors out faster than normal. Aside from that I agree with everybody else above, PCV valve & heavier oil weight.
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Old 04-06-2016, 01:25 PM   #16
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Yes, by all means try a different Weight and Brand of Oil until you find a oil that slows down the consumption. ( some have had luck with Synthetics )
I went thru several brands of oil and finally settled on one of the "High Milage Vehicle" oils in a 10W-30 weight.
You need to check your oil often, if its a daily driver, a couple times a week. Keep oil in the Jeep so you have it !!!! If it runs too low you risk a chance of spinning a bearing !!
Good Luck.... "BH"
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Old 04-06-2016, 10:38 PM   #17
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had this problem on my wife 3.8 caravan after switching to synthetic and she only had 20k at the time. switched back from synthetic to regular oil and all better. these motors use oil and especially with synthetic its crazy.
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Old 05-06-2016, 08:20 PM   #18
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2010 with 3.8, 68k miles using a qt every 1k miles, no leaks, no smoke,
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Old 05-06-2016, 08:30 PM   #19
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My 07 burned a quart every 1k miles. I just kept track of it and changed every 3k miles
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Old 05-07-2016, 07:59 AM   #20
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Like Old Dogger said...check/change PVC valve...
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Old 05-07-2016, 12:07 PM   #21
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My 2011 ate oil. Did all the basic fixes, PCV, heavier oil, etc... Nothing helped considerably, just learned to live with it. Traded it in with 130k miles and never had any major problems with it.
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Old 05-07-2016, 12:15 PM   #22
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Unfortunately a lot of 3.8L engines have/had that problem. Try changing the PCV valve and using a high mileage 5W30 oil. In the warmer months you can even try a high mileage 10W30 oil. Depending where you live you can even use 10W30 year round. Don't let the term High Mileage Oil throw you, it can be used in low mileage vehicles too, especially if you have leaks or oil consumption issues.
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Old 05-07-2016, 06:40 PM   #23
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09 with 59,000+...use 10W30 synthetic since new, does not use oil...
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Old 05-07-2016, 06:54 PM   #24
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09 with 59,000+...use 10W30 synthetic since new, does not use oil...

You got a good one, they weren't all bad.
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Old 05-07-2016, 08:24 PM   #25
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You got a good one, they weren't all bad.
Lol I may have got the one good 09! Must have been tequila day at the plant and happy workers.
94,000 miles and uses 1 quart at 3000 miles.
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Old 05-07-2016, 09:05 PM   #26
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Lol I may have got the one good 09! Must have been tequila day at the plant and happy workers.
94,000 miles and uses 1 quart at 3000 miles.
Yours takes the cake........
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Old 05-08-2016, 11:00 AM   #27
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Quote:
Originally Posted by jeeptank91 View Post
I have a 2011 JK, with 3.8L motor (55,7k miles). The past two oil changes it was 2 quarts low and only drove around 2000~ miles. There is no sign of an oil leak. No smoking, and no significant noises?? Runs good. Has anyone else had any similar issues?
Check your pcv valve. Just get one and replace it, videos on how to on YouTube.

Check for leaks on, around and under your engine.

Purchase a small notebook to keep a record of all maintenance, check your oil every Sunday morning and write it in the notebook, miles, date and such.

This will help you monitor all your Jeep information.

I learned the importance of this while in the military.
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Old 05-08-2016, 11:02 AM   #28
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Originally Posted by Old Dogger View Post
The typo now shows 3.8! As for your oil usage, try changing your PCV valve. I don't know what weight oil that you are using, but if 5W20, try 5W30. I would also check your air filter and the air induction system, to make sure that your engine isn't digestion dirt.
Good ideas!
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Old 05-08-2016, 01:11 PM   #29
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My wife's Dodge Caravan has used quite a bit of oil since ~40k. It has ~120k now and is about the same. Doesn't leak oil or smoke but is always a couple quarts low when it's oil change time. I think it is normal with the 3.8 although it's pretty disappointing for a modern engine.

I hope the 3.6 in my '16JKU fairs better.
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Old 05-08-2016, 07:31 PM   #30
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My 2008 started losing 2 qts every 4000 miles at 16,000. Went through multiple rounds on Chrysler sealed oil change test to find them claiming it's normal. Changed to Pennzoil Platinum 5w-30, and new pcv every 20,000 miles. Oil loss cut to 1/2 quart every 4000 mi change until I traded it in at 117,000 miles. Never a leak, nor visible oil under the wrangler.

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