Most mileage on a JK?
- Thread starter Trailfrog
- Start date
Simons
Adventurer
There must be more to this story. That's ridiculous!! Is there a hole in your oil pan? Did you do 100000 miles with no air filter? I worked for Chrysler for 13yrs as a mechanic, this is not normal. Have you pulled the plugs? Done any diag? Could be a broken oil control ring, dropped valve guide, bad valve seals..... I've seen these with over 300,000kms without engine mechanical issues
brianjwilson
Some sort of lost...
Well known oil burners for sure. Chrysler/jeep has changed their opinion about "normal" oil consumption, due to the 3.8, to 1 quart per 500 miles.
Simons
Adventurer
Lol! i think thats actually a "max tolerance" spec written in every Chrysler engine service manual, as is 5psi minimum oil pressure! Clackidy-clack!
reece146
Automotive Artist
Yeah, well, it is a Chrysler...
wADVr
Adventurer
That's the most I have heard of but not much more consumption. As said above change the PCV. GF had a 300 with the 3.5l that used almost that and it only had 44k on it and her aunt was the original owner and never driven hard etc. Chrysler gave the 1qt per 500 or 1000 miles speech and wouldn't do anything about it even under warrantee so she dumped it.
Trailfrog
Adventurer
Thanks, for the reply's everyone. I did put a new PCV valve on it about two months ago but didn't help. I have the lifetime power train warranty that Chrysler gave with the 2008 models but, of course the dealership is trying to tell me it is my fault because they found some dust in the intake hose. Of course they are the last ones to have the hose off as they cleaned the throttle body on it about six month before it started using oil. The also left the oil plug gasket off the oil change before I started having problems. Didn't know it was low on oil until the oil pressure light came on. by that time it only had about two quarts left in it.
1stDeuce
Explorer
My friend bought an '07 with about 105mi on it a while ago. When he bought it, the oil on the stick was pretty black. He drove it for a few weeks anyway and then decided to give it an oil change. Drained less than two quarts of oil out of it... After wondering how it got that low in perhaps 3000 miles, he finished the oil change and he drove it for another few weeks before it spun a rod bearing. He's got a 5.7 Hemi in it now, and oil consumption isn't a problem. 
Good luck!
Good luck!
bradfordrovers
Observer
I have a 2008 JKU that I purchased with 55K on it. I just turned over 100K and I have had zero issues with the 3.8. I run synthetic 5W30 and typically go through 1/2 a quart of oil between my 3000 mile oil change intervals. I'm also a level 4 Chrysler tech, and believe me folks, this motor may not be a powerhouse, but it has sailed many neglected minivans well over 200K with little to no issues.
I should also note that I purchased it completely stock, and have since done a full AEV JK 350 conversion, and push 37inch tires around daily.
I should also note that I purchased it completely stock, and have since done a full AEV JK 350 conversion, and push 37inch tires around daily.
He's got a 5.7 Hemi in it now, and oil consumption isn't a problem.
Good luck!
Ha, Ive got a 3.8 and a 5.7 Hemi. The 3.8 in the JKU only has 26,000 and its already starting to let out a puff of white smoke on startup.....and I'm religious about maintenance. I find it worrisome.
The 5.7 is a whole different animal......139k on it, doesnt use a drop of oil or feel like it has ANY miles on it....and it hauls a boat all Summer. 5.7 Hemis are proving to be STOUT motors.
jeep-N-montero
Expedition Leader
Wow, I had no idea of the horror stories behind that engine, I thought they were just underpowered. Kind of makes you really want a tried and true 4.0 back under the hood....
