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Unread 07-16-2014, 06:17 AM   #1
Strats
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Weird oil usage

So I picked up a 2010 JKU Rubicon, 3.8L Auto Transmission in March.

I checked the oil every once in a while and noticed it was using about 1 quart/1000 miles. Came here to learn that this might be fairly common. Never had a vehicle that did this but, oh well, nature of the beast I guess.

Took it in for an oil change; lifetime free oil changes; and when I got it home checked the level, etc. Right up to the top of the full line with new oil.

1000 miles later - right up to the full line.

2000 miles later - right up to the full line.

2500 miles - same.

Taking a trip this weekend that will put it over 3000 miles and it doesn't look like it is using any oil. What did the dealer do?

Haven't had a chance to see if they replaced any parts, doesn't look like it.

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Unread 07-16-2014, 06:56 AM   #2
jmb6420
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The dealer could have used a different brand or weight of oil. That could make a difference. Also, it's been my experience that the more miles on your oil, the faster it is consumed. If you are taking a 3000 mile trip, I'd check the oil at every fill up.
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Unread 07-16-2014, 07:54 AM   #3
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Bring a six pack of oil and a funnel just in case.
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Unread 07-16-2014, 08:00 AM   #4
duneslider
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My jeep would use more oil on long trips where I was cruising at constant speeds.

There is a lot of belief that oil was being sucked through the pcv. I know my pcv line was very oily, oil dripped out when I pulled it off. Its possible they replaced the pcv and it is helping.

Some have said going to a heavier weight oil helps, dealerships have been known to not put the correct oil in.
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Unread 07-16-2014, 08:01 AM   #5
JIMBOX
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OK, when did you "pick up a 2010 JKU"?


Quote:
Originally Posted by Strats View Post
So I picked up a 2010 JKU Rubicon, 3.8L Auto Transmission in March.

I checked the oil every once in a while and noticed it was using about 1 quart/1000 miles. Came here to learn that this might be fairly common. Never had a vehicle that did this but, oh well, nature of the beast I guess.

Took it in for an oil change; lifetime free oil changes; and when I got it home checked the level, etc. Right up to the top of the full line with new oil.

1000 miles later - right up to the full line.

2000 miles later - right up to the full line.

2500 miles - same.

Taking a trip this weekend that will put it over 3000 miles and it doesn't look like it is using any oil. What did the dealer do?

Haven't had a chance to see if they replaced any parts, doesn't look like it.
You say 1qt/1000 miles, how many miles have you put on the jeep and what kind of driving ?

Give some more details-

-JIMBO
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Unread 07-16-2014, 04:38 PM   #6
Strats
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Quote:
Originally Posted by JIMBOX View Post
OK, when did you "pick up a 2010 JKU"?




You say 1qt/1000 miles, how many miles have you put on the jeep and what kind of driving ?

Give some more details-

-JIMBO
Picked it up in March of this year with 34,000 miles. I put on 6,000 miles. Each of the two oil changes I would need to put in about 1 quart/1000 miles.

Since the last oil change, # 3, I have added 2,500 miles more but have used zero additional oil.

Driving is every day to the train station (5 miles), with occasional 500 mile weekend trips.

The last oil change includes two 500 mile trips and it is still up to the full mark. Going to look under the hood for "new parts". Let you know if I find anything.
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Unread 07-16-2014, 05:10 PM   #7
JIMBOX
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WOW, thanx for the reply-


Quote:
Originally Posted by Strats View Post
Picked it up in March of this year with 34,000 miles. I put on 6,000 miles. Each of the two oil changes I would need to put in about 1 quart/1000 miles.

Since the last oil change, # 3, I have added 2,500 miles more but have used zero additional oil.

Driving is every day to the train station (5 miles), with occasional 500 mile weekend trips.

The last oil change includes two 500 mile trips and it is still up to the full mark. Going to look under the hood for "new parts". Let you know if I find anything.
You may have overfilled it the last two times and did you change the filter each time ?

Are you NOW using syn/dino and isit 5w-20/5w-30 ??

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Unread 07-16-2014, 05:31 PM   #8
Jiblet
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Maybe those to long trips (or just the new driving style in general) cleaned up the engine somehow? Better gas, better oil, getting it good and hot. Maybe de-coked the rings? Maybe loosened up a stuck PVC. The ol' Italian tune up??

Just guessing. Nice to see someone's oil consumption going down for a change.
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Unread 07-16-2014, 06:17 PM   #9
Strats
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Quote:
Originally Posted by Jiblet View Post
Maybe those to long trips (or just the new driving style in general) cleaned up the engine somehow? Better gas, better oil, getting it good and hot. Maybe de-coked the rings? Maybe loosened up a stuck PVC. The ol' Italian tune up??

Just guessing. Nice to see someone's oil consumption going down for a change.
Maybe. Looking for "new parts" will have to wait. I was distracted by a steak and a Double IPA.

Sorry.
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Unread 07-17-2014, 08:10 AM   #10
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I'd like to know what they used in your Jeep too. I've been experimenting with brands and changed to 5-30 to try to decrease consumption as some have suggested on here.
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Unread 07-18-2014, 08:48 AM   #11
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Quote:
Originally Posted by ironmanathlete View Post
I'd like to know what they used in your Jeep too. I've been experimenting with brands and changed to 5-30 to try to decrease consumption as some have suggested on here.
I switched to 5w-30 and my consumption has gone done some. Still a pain though.
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Unread 07-18-2014, 12:54 PM   #12
jwmbishop
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Its very possible that at bsome point in the last oil change interval - an anomolic condition caused it to gulp some oil and lower the level. Then the cahnge was performed and that condition just has not repeated. My Northstar has done that several times. Now has just over 290K miles - some intervals used NO OIL - sometimes it goes down to add at less than 1500 miles... and it has a 12qt sump!

Which is why you should check your oil at least every other fill up.

I prefer not to use weird oil though...
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Unread 07-18-2014, 01:47 PM   #13
jay-h
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Engines respond different ways. I use less oil on long trips.
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Unread 07-19-2014, 10:24 AM   #14
chris142
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id try a 10w30. see if its burning the 5w for some reason. a little off track but my diesel pickup drinks 5w40 like its fuel but not 15w40. both are 40w when hot.well as thin as a hot 40 anyway
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