View Poll Results: (Check all that apply) My Jeep Wrangler has between 30K and 50K miles, and...
Multiple Choice Poll. Voters: 293. You may not vote on this poll
30K - 50K mile engine issues poll
08-04-2010, 02:34 PM
#11
JK Enthusiast
No issues here! i'm at 76,000 change my oil ever 3-4,000 miles n use 5-20 mobile 1 synthetic and fram extra guard oil filters. Lots n lots n lots of wheelin lots of water crossings 
08-04-2010, 02:35 PM
#12
JK Freak
Join Date: Apr 2010
Location: San Diego, CA
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No problems yet at 43k. I went to the dealer for oil changes up to 36k, after that I have been going to a vavoline quick stop, using the basic req oil and filter. I've been thinking about using a synthetic soon just b/c of wear and tear.
08-04-2010, 08:26 PM
#15
JK Enthusiast
Join Date: Jul 2010
Location: canyon lake,ca
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Only thing i have ever noticed is that if i use the 5w-20 it knocks slightly in the morning. worse in the winter, if you call so cal winters winter that is. anyone else notice this? I have 40,000 on mine now. i use 5w-30.
08-04-2010, 09:08 PM
#17
JK Freak
Join Date: Apr 2010
Location: Riverside, CA
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35k on a used 07 Sahara. I bought it in April (at Carmax) and just found out that it's burning a lot of oil. Got a surprise when my oil light starting flickering. Pulled over right away, checked oil, and walked over to the auto parts store. My first Jeep so didn't realize this was an issue. Engine was almost 4 quarts low.
Refilled and no knocking or anything so I think I'm ok. Going to try switching to 5w-30.
Refilled and no knocking or anything so I think I'm ok. Going to try switching to 5w-30.
08-05-2010, 06:08 AM
#19
JK Enthusiast
Join Date: Nov 2009
Location: Fredericksburg, Virginia, United States
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I bought mine used, w/20,000 miles on it I think it was a lease or rental w/ pretty regular maintenence I suspect & at my first oil change I switched to 5w/20 synthetic @ dealer every 3,000 mis. I was driving so much I switched to regyular oil last change due to cost & going to change this wk @ 37,xxx mis. No problems to report here!
08-05-2010, 11:26 AM
#20
JK Freak
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Join Date: Jul 2009
Location: Madison, AL
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Used 5W20
No Mods other than Flashpaq
Changed oil every 4k miles
Spun number one Main Bearing @ 45k miles. Damage to crank, journals, who knows how much metal went through the engine. Hopefully the filter caught it all. In the process of tearing the engine out and getting a look inside.
I know those of us that have had similar issues with engine problems are WAY in the minority, but it is a shame that Jeep didn't stick with the 4.0L Straight 6. I realize that no other Chrysler vehicle used that motor, but it was just about bullet-proof.
Anthony
No Mods other than Flashpaq
Changed oil every 4k miles
Spun number one Main Bearing @ 45k miles. Damage to crank, journals, who knows how much metal went through the engine. Hopefully the filter caught it all. In the process of tearing the engine out and getting a look inside.
I know those of us that have had similar issues with engine problems are WAY in the minority, but it is a shame that Jeep didn't stick with the 4.0L Straight 6. I realize that no other Chrysler vehicle used that motor, but it was just about bullet-proof.
Anthony