3.8 engine oil - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > JK Wrangler Technical Forum > 3.8 engine oil

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineThe Solution to Radius Arm Bind - Meet Lock-N-LoadFS: Jeep Fog Light LED Bulbs! Several Brightness Options!

Reply
Unread 01-06-2013, 06:39 PM   #1
michiganmaveric
Got Beer?
 
michiganmaveric's Avatar
2011 JK Wrangler 
 
Join Date: Aug 2004
Location: Southeast Michigan
Posts: 2,733
3.8 engine oil

We all know how the 3.8's like to burn/use oil, but are these engines made so bad that they would cause the oil to have a burnt/overheated smell/look to it after just 5000 miles? I had my oil changed at my regular Penzoil Quick lube and the tech stated that the oil smelled like it was burnt. I use Penzoil Platinum 10W30.

I have 41000 miles on the Jeep and it has never been overheated. Are the rings that bad? Clearances too loose?

__________________
Previous Jeeps: 84 CJ7 (A True Jeep), 2000 XJ (163,000 Miles/Totaled (Pictures of wrecked Jeep in gallery)), 2004 WJ (parting out die to major electrical issues)

If you don't have time to do it right the first time, how do you have time to do it over.

Lifetime member #13

www.militaryjeepers.com lifetime member/airforce26yrs

2011 Tango/Mango JKU
michiganmaveric is offline   Reply With Quote Quick reply to this message
Unread 01-06-2013, 06:41 PM   #2
jeeperjk
Web Wheeler
2009 JK Wrangler 
 
Join Date: May 2008
Location: Browns Mills, New Jersey
Posts: 1,493
Is 10W30 recommended for the 2011's? I know my '09 recommends 5W20. Not sure if that'd have any bearing on this, but figured I'd throw that out there.
jeeperjk is offline   Reply With Quote Quick reply to this message
Unread 01-06-2013, 08:04 PM   #3
michiganmaveric
Got Beer?
 
michiganmaveric's Avatar
2011 JK Wrangler 
 
Join Date: Aug 2004
Location: Southeast Michigan
Posts: 2,733
N0t recommended but my dealer said OK and would not void the warranty if I take it to him for problems. 5W20 recommended, but I don't see where the weight would make a difference in the burnt smell.
__________________
Previous Jeeps: 84 CJ7 (A True Jeep), 2000 XJ (163,000 Miles/Totaled (Pictures of wrecked Jeep in gallery)), 2004 WJ (parting out die to major electrical issues)

If you don't have time to do it right the first time, how do you have time to do it over.

Lifetime member #13

www.militaryjeepers.com lifetime member/airforce26yrs

2011 Tango/Mango JKU
michiganmaveric is offline   Reply With Quote Quick reply to this message
Unread 01-06-2013, 08:58 PM   #4
jeeperjk
Web Wheeler
2009 JK Wrangler 
 
Join Date: May 2008
Location: Browns Mills, New Jersey
Posts: 1,493
Eh, probably not, but I figured I'd ask. Would a thicker/thinner heavier/lighter oil not cause more friction/heat?
jeeperjk is offline   Reply With Quote Quick reply to this message
Unread 01-07-2013, 12:53 AM   #5
Rtone1583
Registered User
2009 JK Wrangler 
 
Join Date: Oct 2012
Posts: 194
My opinion: Motor oil (for gas motors) is designed to operate around 350° F so, I would think, if it smells burnt or actually is burning that something bigger/worse is happening in the motor to get it over the operating temp and into the burning temp range, although I don't know what the burning temp is for motor oil. It may be worthwhile to have your oil tested next time you have it changed to see if anyting abnormal pops up.
Rtone1583 is offline   Reply With Quote Quick reply to this message
Unread 01-07-2013, 05:29 AM   #6
LIJeepJC
Registered User
2012 JK Wrangler 
 
Join Date: Feb 2012
Location: Merrick, New York
Posts: 1,055
Quote:
Originally Posted by michiganmaveric
We all know how the 3.8's like to burn/use oil, but are these engines made so bad that they would cause the oil to have a burnt/overheated smell/look to it after just 5000 miles? I had my oil changed at my regular Penzoil Quick lube and the tech stated that the oil smelled like it was burnt. I use Penzoil Platinum 10W30.

I have 41000 miles on the Jeep and it has never been overheated. Are the rings that bad? Clearances too loose?
To say that an engine that has been around for such a long time and has been used in many different applications successfully, is "so bad" is a bit shall we say, wrong?
Are you sure the oil is burnt? Does the engine sound weird? What does your mechanic say? Not saying you are wrong, just being objective. Good luck
LIJeepJC is offline   Reply With Quote Quick reply to this message
Unread 01-07-2013, 07:29 AM   #7
michiganmaveric
Got Beer?
 
michiganmaveric's Avatar
2011 JK Wrangler 
 
Join Date: Aug 2004
Location: Southeast Michigan
Posts: 2,733
^^^^^^Yes, the 3.8 has been around for a long time, but as noted they are known for high oil consumption. From what I have seen on the web sites they have a ring problem. I am just wondering if the tolerances are so loose that some combustion is bypassing the rings and overheating the oil.

I have never had an engine that when brand new uses oil from the get go. Although mine is not as bad as others I have read about, I am using about a quart per oil change, 5000 miles.

Haven't taken it to a mechanic, just going on what the oil change tech told me.
__________________
Previous Jeeps: 84 CJ7 (A True Jeep), 2000 XJ (163,000 Miles/Totaled (Pictures of wrecked Jeep in gallery)), 2004 WJ (parting out die to major electrical issues)

If you don't have time to do it right the first time, how do you have time to do it over.

Lifetime member #13

www.militaryjeepers.com lifetime member/airforce26yrs

2011 Tango/Mango JKU
michiganmaveric is offline   Reply With Quote Quick reply to this message
Unread 01-07-2013, 07:31 AM   #8
Joevacs
Registered User
2010 JK Wrangler 
 
Join Date: Sep 2010
Location: Hickory, NC
Posts: 1,235
I think yall have all missed the key to this mystery. He took it to a Jiffy Lube ( or equivalent ) ...

Do you really trust what one of those guys tells you about ANYTHING ? Sure there are probably a few good ones, but on average those places have idiots working for them.

Just a thought. If your's is a good one , or if you know the guy that's fine. Not trying to offend, just pointing out what seems obvious to me.

I would recommend changing your own oil and use 5w30. A JK is about the easiest thing there is to change oil on. I changed mine a week ago. Took me about 10 minutes and that was mostly wait time for the oil to drain out.
__________________
2010 Rubicon, 4" lift, Currie control arms and trackbar, 37x12.5x17 Goodyear MT/R kevlar
Joevacs is offline   Reply With Quote Quick reply to this message
Unread 01-07-2013, 07:54 AM   #9
LIJeepJC
Registered User
2012 JK Wrangler 
 
Join Date: Feb 2012
Location: Merrick, New York
Posts: 1,055
Quote:
Originally Posted by Joevacs View Post
I think yall have all missed the key to this mystery. He took it to a Jiffy Lube ( or equivalent ) ...

Do you really trust what one of those guys tells you about ANYTHING ? Sure there are probably a few good ones, but on average those places have idiots working for them.

Just a thought. If your's is a good one , or if you know the guy that's fine. Not trying to offend, just pointing out what seems obvious to me.

I would recommend changing your own oil and use 5w30. A JK is about the easiest thing there is to change oil on. I changed mine a week ago. Took me about 10 minutes and that was mostly wait time for the oil to drain out.
I missed the "JiffyLube" part of the OP's thread...

Honestly, take it to a REAL mechanic bro... Have them look at it. These guys that change oil at these quicky lube joints are bottom barrel when it comes to knowledge..
LIJeepJC is offline   Reply With Quote Quick reply to this message
Unread 01-07-2013, 07:56 AM   #10
LIJeepJC
Registered User
2012 JK Wrangler 
 
Join Date: Feb 2012
Location: Merrick, New York
Posts: 1,055
Quote:
Originally Posted by michiganmaveric View Post
^^^^^^Yes, the 3.8 has been around for a long time, but as noted they are known for high oil consumption. From what I have seen on the web sites they have a ring problem. I am just wondering if the tolerances are so loose that some combustion is bypassing the rings and overheating the oil.

I have never had an engine that when brand new uses oil from the get go. Although mine is not as bad as others I have read about, I am using about a quart per oil change, 5000 miles.

Haven't taken it to a mechanic, just going on what the oil change tech told me.
I agree... I have read threads about the 3.8 and oil consumption. But please, take her to a mechanic that knows what they are talking about. That's all I am saying...

BTW, Maybe what he smells is oil spilled on the exhaust header, or some other hot part?? Just sayin!

Good luck!!
LIJeepJC is offline   Reply With Quote Quick reply to this message
Unread 01-07-2013, 09:35 AM   #11
michiganmaveric
Got Beer?
 
michiganmaveric's Avatar
2011 JK Wrangler 
 
Join Date: Aug 2004
Location: Southeast Michigan
Posts: 2,733
Quote:
Originally Posted by Joevacs View Post

Just a thought. If your's is a good one , or if you know the guy that's fine. Not trying to offend, just pointing out what seems obvious to me.

I would recommend changing your own oil and use 5w30. A JK is about the easiest thing there is to change oil on. I changed mine a week ago. Took me about 10 minutes and that was mostly wait time for the oil to drain out.
In the summer I do change my own oil, but no garage in the winter means I take it to a quick lube. I have used this place for years and trust them. I did check my oil before going there and it did seem to look a little on the burnt side color wise.

Probably will not take it to a mechanic. Will drive it until the warranty is up keeping an eye on the oil level. Might do an oil analysis next change and see what they say.

No offense taken, as I know a lot of the quick lube places are really bad.
__________________
Previous Jeeps: 84 CJ7 (A True Jeep), 2000 XJ (163,000 Miles/Totaled (Pictures of wrecked Jeep in gallery)), 2004 WJ (parting out die to major electrical issues)

If you don't have time to do it right the first time, how do you have time to do it over.

Lifetime member #13

www.militaryjeepers.com lifetime member/airforce26yrs

2011 Tango/Mango JKU
michiganmaveric is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.