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#2528149 - 02/07/12 11:12 AM Jeep Cherokee 4.0 Rotella T6 OCI
jeepman3071 Offline


Registered: 04/15/10
Posts: 3462
Loc: Storrs, Connecticut
2000 Jeep Cherokee with the 4.0L engine and 118k miles.
I will be running Rotella T6 5w40 and the remainder of my Wix 51085 filters for a bit. This jeep is used to commute daily to college. 7 miles there and 7 miles back. I occasionally drive elsewhere for longer trips but my driving is mainly in town and short trips. What should I do for an OCI? I will eventually send out a sample to Blackstone for a UOA.
_________________________
2000 Jeep Cherokee Sport 4.0L (175k) - Pennzoil HM 10w30, Wix 51516, Magnefine trans filter

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#2528159 - 02/07/12 11:17 AM Re: Jeep Cherokee 4.0 Rotella T6 OCI [Re: jeepman3071]
dparm Offline


Registered: 04/19/10
Posts: 13423
Loc: Chicago, IL
5k easily, maybe 6-7k. It depends on how often you're getting it out on the highway (once a week, every other week, once a month, etc).
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#2528172 - 02/07/12 11:27 AM Re: Jeep Cherokee 4.0 Rotella T6 OCI [Re: dparm]
jeepman3071 Offline


Registered: 04/15/10
Posts: 3462
Loc: Storrs, Connecticut
Originally Posted By: dparm
5k easily, maybe 6-7k. It depends on how often you're getting it out on the highway (once a week, every other week, once a month, etc).


I probably go on the highway once a week, but its only for 10 miles or so.
_________________________
2000 Jeep Cherokee Sport 4.0L (175k) - Pennzoil HM 10w30, Wix 51516, Magnefine trans filter

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#2528240 - 02/07/12 12:39 PM Re: Jeep Cherokee 4.0 Rotella T6 OCI [Re: jeepman3071]
dparm Offline


Registered: 04/19/10
Posts: 13423
Loc: Chicago, IL
I'd say 5-6k. Look for fuel dilution or moisture in the Blackstone report, or ask for a TAN & TBN test.
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#2528252 - 02/07/12 12:47 PM Re: Jeep Cherokee 4.0 Rotella T6 OCI [Re: jeepman3071]
ahoier Offline


Registered: 02/03/10
Posts: 1724
Loc: Cocoa, FL
I'd take the sample from the dipstick tube, or quick drip of the oil drain plug (wear an ove'glove or something LOL- hot oil, is HOT) ....cause 1) you want the oil warmed up for the oil sample, secondly, you only need about 4-6 oz. for the sample, not 6 quarts smile So that's what I mean by "quick drip" lol...

But yea, take the sample at 5k.....and then wait for the results, if it looks bad, call it a 5k OCI, if it looks OK, go to 8k.....and resample....or [censored], just drain it, and call it a day smile

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#2528261 - 02/07/12 12:51 PM Re: Jeep Cherokee 4.0 Rotella T6 OCI [Re: jeepman3071]
KCJeep Offline


Registered: 06/30/11
Posts: 6846
Loc: Mahzurrah!
Easily 6k to 7.5k IMO, no problem. Getting a UOA is a good idea, that will eliminate many doubts.
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04 Jeep Grand Cherokee 4.0 145k - GTX 5w30/10w40
09 Lincoln MKZ AWD 83k - Magnatec 5w30
12 KIA Sedona 79k - Edge 0w40
09 Ford Focus 124k - QSUD 5w30

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#2528438 - 02/07/12 02:55 PM Re: Jeep Cherokee 4.0 Rotella T6 OCI [Re: jeepman3071]
jeepman3071 Offline


Registered: 04/15/10
Posts: 3462
Loc: Storrs, Connecticut
Sounds good. thumbsup I'll do a UOA with TBN after 5k miles. I'm trying to consolidate my oil stash to only a few brands. Rotella seems to work well in both my jeep and outdoor power equipment.
_________________________
2000 Jeep Cherokee Sport 4.0L (175k) - Pennzoil HM 10w30, Wix 51516, Magnefine trans filter

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#2528468 - 02/07/12 03:16 PM Re: Jeep Cherokee 4.0 Rotella T6 OCI [Re: jeepman3071]
ltslimjim Offline


Registered: 08/06/10
Posts: 5637
Loc: WatUpDoc
Great course of action.

drive
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#2528719 - 02/07/12 07:18 PM Re: Jeep Cherokee 4.0 Rotella T6 OCI [Re: jeepman3071]
Jarlaxle Offline


Registered: 02/02/12
Posts: 7856
Loc: New England
Be aware: this Jeep may have the dreaded "0331" cylinder head! The early distributorless-ignition 4.0's (1999-early 2001) had it, and it has a cracking problem. There are usually only two indications: the most common is disappearing coolant with no indication of a leak. SOmetimes, looking in the oil filler will show glop between the #3 and #4 cylinders. There is almost never any external leakage! The coolant leaks into the oil pan.
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1979 Coupe de Ville, 542 stroker, Super Tech 15W40, Delco
2011 Crown Vic P71, 5W-20 NextGen, Motorcraft
2012 Suzuki Burgman 400, Valvoline 10W40, K&N

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#2542725 - 02/20/12 11:49 AM Re: Jeep Cherokee 4.0 Rotella T6 OCI [Re: jeepman3071]
MetalSlug Offline


Registered: 07/24/10
Posts: 2510
Loc: vicksburg ms
how come you guy recomment oil change by miles, and not by month ? his driving condition is very similar to mine. and Im going to use T6 on next oil change. If I go by miles 5000-6000 miles, it would take closer to a years for me.
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#2542747 - 02/20/12 12:17 PM Re: Jeep Cherokee 4.0 Rotella T6 OCI [Re: Jarlaxle]
jeepman3071 Offline


Registered: 04/15/10
Posts: 3462
Loc: Storrs, Connecticut
Originally Posted By: Jarlaxle
Be aware: this Jeep may have the dreaded "0331" cylinder head! The early distributorless-ignition 4.0's (1999-early 2001) had it, and it has a cracking problem. There are usually only two indications: the most common is disappearing coolant with no indication of a leak. SOmetimes, looking in the oil filler will show glop between the #3 and #4 cylinders. There is almost never any external leakage! The coolant leaks into the oil pan.


I've installed an Alabama Cylinder head on my Jeep which has the improved casting. thumbsup
_________________________
2000 Jeep Cherokee Sport 4.0L (175k) - Pennzoil HM 10w30, Wix 51516, Magnefine trans filter

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#2543262 - 02/20/12 08:44 PM Re: Jeep Cherokee 4.0 Rotella T6 OCI [Re: jeepman3071]
rslifkin Offline


Registered: 06/27/10
Posts: 2750
Loc: Rochester, NY
My mom's 4.0 gets most 3 mile trips to work and back, and I've been letting it go 5k on T6. It usually smells a bit gassy if she hasn't taken a highway run in a week or 2, but I've never seen a sign of moisture in the oil. I'd go 6k and do a UOA to see where you stand, 7k or so will probably be fine.
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1998 Jeep Grand Cherokee 5.9 Limited with lots of mods (225k miles, bought with 100k in 1/2010)
Rotella T6 @ 6k OCI

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