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Oil for a 2011 Jeep Liberty #4112094 06/01/16 06:04 AM
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timh975 Offline OP
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Hey guys, so I have a 2011 Jeep Liberty with the 3.7L V6. I've been using Mobil 1 Full Synthetic 5w20. I've been changing the oil myself but because doing an oil change on this thing is such a major P.I.T.A. (no easy way to do it), my wife thinks we should let the dealer do it. They supposedly use Pennzoil oil. Now I've been using M1 oils for a long time and have had excellent luck with it (my 2001 GMC Sierra has 225,000 miles and NO leaks), so I want to stick with that. I prefer not to use Pennzoil, not to mention letting a dealer do something I'm fully capable of doing myself, but since I'm amongst oil gurus I figured someone in this forum might tell me it's just as good. Any info is appreciated.

Tim H.

Re: Oil for a 2011 Jeep Liberty [Re: timh975] #4112100 06/01/16 06:15 AM
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Miller88 Offline
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Pennzoil is a highly regarded oil on here. Unlike 30+ years ago, it does not cause engine sludge any more.


18 Forester 2.5I 6M
00 Jeep XJ
01 F-350 4x4 5M
Re: Oil for a 2011 Jeep Liberty [Re: timh975] #4112129 06/01/16 06:53 AM
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Chris142 Offline
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Nothing wrong with pz.that was 40 yrs ago and the rumor still won't die


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: Oil for a 2011 Jeep Liberty [Re: timh975] #4112156 06/01/16 07:28 AM
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demarpaint Offline
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Pennzoil is fine and it meets the MS6395 spec. Mobil 1 doesn't meet the spec, Mobil Super does. As far as doing it yourself, let your wife read some of the horror stories here about having shops and/or dealers changing oil. That might convince her.

I have 3.7L 2008 Liberty, changing the oil isn't that bad although the oil filter is in a lousy place.


God Bless Our Troops

Re: Oil for a 2011 Jeep Liberty [Re: timh975] #4112184 06/01/16 07:55 AM
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ARCOgraphite Offline
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Try M1 0w20 EP and leave it for 10K min. This oil we speculate to be a majority poly a olefin base where as the GTL sopus/pennzoil are isoparaffin. The 5w20EP is purported to be not as robust if we use buster's fine link to XOM MSDS. Don't worry about the 0W multigrade class not fitting, this doesn't have anything to do with oil viscosity from cold to hot (though many Asian formulations took it upon themselves to make this a very light weight lube (kv100 ~ 7) with slickifiers to push CAFE #'s.


2019 VW Jetta S 6MT OCI#2 7378mi-MOTUL Specific VW508.00+VW Service Filter; '17 Subaru Crosstrek CVT OC#8 60864mi-Subaru Idemitsu 0W20 + SOA Filter
Re: Oil for a 2011 Jeep Liberty [Re: timh975] #4112243 06/01/16 08:55 AM
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ksp7498 Offline
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I have a 2012 Liberty and you are right there is no decent way to do it yourself. The filter is almost impossible to reach and I just don't have the time to fuss with it anymore. I just take it to the dealer. The 3.7 is not a picky engine. It's going to live longer than the 42RLE no matter what oil you run in it.

Re: Oil for a 2011 Jeep Liberty [Re: timh975] #4112738 06/01/16 06:32 PM
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KCJeep Offline
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Not keen on a 20 grade for that engine at all...but it won't grenade on the stuff either.


2018 VW Passat GT VR6 - 22k - Castrol Pro OE 5w40 - VW OEM filter
2012 KIA Sedona 104k - Valvoline Maxlife 5w30
2012 VW Tiguan 105k - Castrol 0w40
2004 Jeep Grand Cherokee, gone but not forgotten.
Re: Oil for a 2011 Jeep Liberty [Re: timh975] #4112966 06/01/16 10:57 PM
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timh975 Offline OP
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Thanks everyone, you have all been a great help. My dad has worked on cars since he was young and always said Pennzoil and Quaker State were no good. But like you guys have said, they have come a long way. And yes, dealers frighten me with the things they do and try to pull. I heard somewhere that if I can get the skid plate off, the oil filter is right there. I'd have to check into that to be sure.

Do you think I should stick with the 5w20, or is 10w30 ok?

Re: Oil for a 2011 Jeep Liberty [Re: timh975] #4114893 06/04/16 08:28 AM
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KCJeep Offline
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The 10w30 would be just fine in summer but you'd be best off with a good 5w30 and just stick with it IMO.


2018 VW Passat GT VR6 - 22k - Castrol Pro OE 5w40 - VW OEM filter
2012 KIA Sedona 104k - Valvoline Maxlife 5w30
2012 VW Tiguan 105k - Castrol 0w40
2004 Jeep Grand Cherokee, gone but not forgotten.
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