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Old 11-03-2011, 02:47 PM   #1
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Wrangler oil change schedule??

The owner's manual for my 2001 Sahara says to change the engine oil at 7,500 miles or 6 months. I won't turn 7,500 miles in one year. My Haynes Repair manual says change in One Year.

My other 2004 and 2006 vehicles give a mileage or one year. Is Chrysler still sticking with the 6 month duration or have they updated this in later years?

Also the Wrangler manual says to change the transfer case fluid every 24 months. Does everyone use this schedule too? How much usage does the transfer case really get when running in 4X2 drive?
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Old 11-03-2011, 03:21 PM   #2
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Thge oil change question is a rabbit hole. The only way to know for sure is to do an oil analysis. The actual miles you can run between changes relaly depends on how you drive etc.... 7500 is too long. I would stick to 3000 to 4000 miles. If you are like me and don't drive it much, I would do it twice per year regardless of miles driven. Mine gets changed about every 2k because of that.

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Old 11-03-2011, 04:27 PM   #3
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I stick to the 3000 to 4000 miles on all my vehicles. Going to do the same with the Jeep. of course I put on over 500 miles a month on the Jeep.
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Old 11-03-2011, 11:13 PM   #4
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I also change my oil around 3,500 miles, give or take a few hundred, but it may take 7-9 months to do it. Always surprises me that Chrysler would suggest 7,500 miles then restrict that to 6 months.

The only reason I was asking opinions is I have a small extented warranty that only covers the power train, and the only reason I keep it is for the last several winters when the temps get below 20-25 degrees I have a slight grumble on start up while in Park but quits as soon as I shift into Neutral for a minute then its gone when I go back to Park. I've talked to the Jeep dealer and a small transmission shop about this but all I get is "we'll have to leave it setting in the parking lot over night then listen to it in the morning". But I know from experience they'll run it inside the next morning before attempting to diagnose the noise and it will be gone before they reach the shop door. And I definitely don't want to leave it in their parking lot overnight, especially in their neighborhoods. Kind of a catch 22 situation.
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Old 11-03-2011, 11:16 PM   #5
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Keep an eye on your oil, if it turns jet black and thick, change it. 3-7K Miles is a good area to figure it out. And it all depends on your style of driving, are you driving it in the city like a grandpa all the time, Then 5k-7k, if you are in the woods bouncing it @ 5,000 rpms all the time I would say every 3k miles.
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Old 11-04-2011, 01:35 PM   #6
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Very little town driving, mostly highway at 2,000-2,300 RPM or a small amount of mountain back roads between 2,000-3,000 RPM. With a 3:07 differential I doubt the engine has ever been over 3,500 in the 10 years I've owned it. Probably just a coincedence but I recently ran the engine up to 3,200 (first time in several weeks) in 2nd gear (automatic) while in the Black Hills vacationing and a week later both the idler and tension bearings started growling. Thank goodness I was in a town visiting relatives when the noise started and a parts house was very close.
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Old 11-04-2011, 02:34 PM   #7
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From 2004 Wrangler OM (available online at jeep.com):

Schedule "B": 3000 miles/5000 kms for oil; 60,000 miles/96,000 kms for transfer case.

Schedule "A": 6,000 miles/10,000 kms/6 months for oil; 120,000 miles/192,000 kms/120 months for transfer case.

Transfer case needs to be periodically inspected for fullness for both schedules.

The only way to get dirt out of your oil pan is to change the oil. That's one reason some change their oil more often, even when they use "synthetic" oil. The more colder startups, shorter trips, and longer periods of idling for examples, contribute to more dirt in the oil pan.

OP: What fluid does your transfer case call for? I found mine went in and out of 4WD better after a change this year. Mine calls for ATF+4 and that should be good for about 80,000 to 100,000 miles being that it's "synthetic".

My oil change schedule: usually shy of 5,000 miles/8,000 kms using conventional oil and an oversize Mopar/Wix filter. I don't pay attention to the months that much as long as the Jeep is getting some highway trips of 20+ minutes or so.
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Old 11-04-2011, 02:37 PM   #8
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I change my oil when I remember. Which is any wheres between 3k and 7k. I dont drive it much anymore. But you should be good changing every 4k

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