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Unread 04-18-2013, 09:41 PM   #1
kellydaz
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jk oil consumption

I have a 2008 jk sahara unlimited and i am finding that my oil level drops to low before i can get 3000 miles out of an oil change. i do not see any oil leaking, nor do i have any on my garage floor. i occasionally smell oil burning but havent seen any smoke from the engine. Anybody else having this issue?

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Unread 04-18-2013, 10:13 PM   #2
janders82
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I haven't had the issue, but you shoul definitely try using the search function on this forum. This topic has been chatted about over and over. The 3.8L is known to be an oil consumer. Some report a quart or more being burned before their next oil change. Not sure that I've heard many report about smelling oil burning though. May want to dig a little deeper into that if you're actually smelling oil burning
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Unread 04-19-2013, 08:07 AM   #3
LHS-Cowboy
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yes, dealer said it was within specs. i use 1.5 - 2 qts. within 3k miles. I have changed my oil every 2500 miles since new. 2008 with 70k on it.
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Unread 04-19-2013, 08:26 AM   #4
gunut
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the 09 I just traded in would use a quart about 2500/3000 miles. had 52000 when traded...I changed oil around every 3500/4000 miles and used 5w20 full syn....
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Unread 04-19-2013, 08:50 AM   #5
spyder6
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Look at it this way, you don't have to get oil changes - just keep adding oil and change your filter!

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Unread 04-19-2013, 10:39 AM   #6
ncb
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Quote:
Originally Posted by spyder6
Look at it this way, you don't have to get oil changes - just keep adding oil and change your filter!

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Yes! Progressive oil change schedule.
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Unread 04-21-2013, 07:52 PM   #7
Jiblet
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Quote:
Originally Posted by kellydaz View Post
I have a 2008 jk sahara unlimited and i am finding that my oil level drops to low before i can get 3000 miles out of an oil change. i do not see any oil leaking, nor do i have any on my garage floor. i occasionally smell oil burning but havent seen any smoke from the engine. Anybody else having this issue?
Mechanically, the easiest cheapest first step is to replace the PCV valve. $10 part. That has cured plenty of instances of disappearing oil, enough to be worth a shot anyway.

Some folks change to xW-30 (from xW-20).

Delving deeper, you could pull some spark plugs and inspect them for indications of trouble. And have a compression check to help determine if you have a problem with your rings. There were some improperly assembled engine internals reported a few years a ago.

Legally, depending on who you bought it from you may have recourse with them if it was a known issue and you weren't informed. Depending on where you live, etc.
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Unread 04-22-2013, 10:18 AM   #8
SoK66
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Dealers are essentially being forced by Chrysler not to condemn engines for consumption and warranty replacement. There's not way that kibd of consumption is "normal". Some 2008s were assembled incorrectly by the Mexican engine plant, but by now most of those should have been cycled. The ongoing issue with the 3.8L seems to be a byproduct of the 5w-20 oil spec. To wit, some techs suggest the 5w-20 burns off, causes the PCV valve to stick open slightly, drawing more oil into the plenum than normal. The oil burns off causing the rings to become inefficient, etc., etc. round & round we go. Step one, replace the PCV valve with one of the newer design, or an aftermarket piece. (Chrysler has superseded the earlier part number.) Step two, run a Seafoam treatment through the intake to clear the oil based carbon off the valves, the top of the pistons and loosen the rings. Step 3, change the oil and filter and use 5w-30 or even 10w-30. Some guys have even said they use a diesel spe. 10w-40 and have had great success.

Mine ('09 JKRU) started to consume a bit of oil at around 10k. I switched to 5w-30 at that point and now at 35k the consumption is extremely small, maybe 1/4 qt in 3k miles.
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Unread 04-22-2013, 10:33 AM   #9
wilywillie
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Mine has burned a quart every 1,000 miles for years! (110,000mi) I check the dipstick every fuel stop, but again, Mopar said "this it's within limits". I can't scream BULL CRAP any louder, but I'll look at the PCV idea. Thanks for the tip!
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Unread 04-22-2013, 03:48 PM   #10
Green08
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Quote:
Originally Posted by SoK66 View Post
Dealers are essentially being forced by Chrysler not to condemn engines for consumption and warranty replacement. There's not way that kibd of consumption is "normal". Some 2008s were assembled incorrectly by the Mexican engine plant, but by now most of those should have been cycled. The ongoing issue with the 3.8L seems to be a byproduct of the 5w-20 oil spec. To wit, some techs suggest the 5w-20 burns off, causes the PCV valve to stick open slightly, drawing more oil into the plenum than normal. The oil burns off causing the rings to become inefficient, etc., etc. round & round we go. Step one, replace the PCV valve with one of the newer design, or an aftermarket piece. (Chrysler has superseded the earlier part number.) Step two, run a Seafoam treatment through the intake to clear the oil based carbon off the valves, the top of the pistons and loosen the rings. Step 3, change the oil and filter and use 5w-30 or even 10w-30. Some guys have even said they use a diesel spe. 10w-40 and have had great success.

Mine ('09 JKRU) started to consume a bit of oil at around 10k. I switched to 5w-30 at that point and now at 35k the consumption is extremely small, maybe 1/4 qt in 3k miles.
It's not just Chrysler, the below is from a Toyota owners manual.

●Oil consumption: Max. 1.1 qt./600 miles (0.9 Imp. qt./600 miles, 1.0 L/
1000 km)
●If your vehicle consumes more than 1.1 qt. (1.0 L, 0.9 Imp. qt.) every 600
miles (1000 km), contact your Toyota dealer.
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Unread 04-22-2013, 04:43 PM   #11
rirrgang
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My 07 has burned oil since day one. I keep a couple of qts on hand all the time. I go about 2k per qt. For me, I don't car if the engine blows up. I'm one of the lucky lifetime powertrain warranty guys.
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Unread 02-08-2014, 11:00 AM   #12
LHS-Cowboy
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Went to 10-40, no more consumption.
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R.E. Modified 3.5 Super Flex Kit to 4+/Ft. & Rr. U-joint driveshafts/Full Traction Rear Adj. Trackbar/Custom Ft. Heim Joint Adj. Trackbar/Rancho 9000XL shocks/Yukon 4.88 Gears & Superior Rear Axle Shafts/37" Pitt Bull Rockers on Custom Allied Beadlocks/Poly Perf. Rock Sliders/Shrockworks Mid Ft. & Rear Bumper/Custom Trans. Crossmember and Skid/Custom High Steer with PSC Hydro Assist/Plumbed Warn PowerPlant HP/Cobra 75 WS XT C.B./Bully Dog Programmer/Custom Exhaust/Dual Optimas/48" X-treme Hi-Lift Jack on Custom Rear Swing Away Carrier/...

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OlllllllO]
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Unread 02-08-2014, 09:46 PM   #13
gunbo75
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Mine was using oil bad went to the dealer had my oil changed and had the PVC valve changed and now no more oil used.
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