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#4591892 - 12/02/17 09:46 AM 2004 Rubicon Oil
mmohr Offline


Registered: 12/16/16
Posts: 12
Loc: Pennsylvania
Sorry to bring up an old topic, but i have not seen many recent posts and things change with technology. should be an easy question for all of you oil enthusiasts, I have an 04 Rucicon that is my toy. It gets about 3000 miles per year on. Mostly sits in garage. I currently run Amsoil Sig series 10/30
I have been reading about the M1 Delvac 5/40 as being an excellent choice. I only change oil once per year, Is there any better choices for my situation of barely driving that would better fit the flat tappet engine? Or stick with the Amsoil?

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#4591921 - 12/02/17 10:18 AM Re: 2004 Rubicon Oil [Re: mmohr]
skyactiv Offline


Registered: 03/02/13
Posts: 4405
Loc: The Midwest
I think what your using is just fine.
_________________________
Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual

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#4591927 - 12/02/17 10:25 AM Re: 2004 Rubicon Oil [Re: mmohr]
bubbatime Offline


Registered: 03/18/08
Posts: 5628
Loc: South Florida
That old, and I mean OLD design 4.0 straight six engine, loves a 40 weight oil. I would run any of the synthetic 5W40 heavy duty diesel/gas oils, such as Delo or Rotella.

Your car called for API certified oil meeting SM. If that's important to you, just make sure the back of the bottle says SM, or the superseded SN. Some of the the dual rated oils have been removing the gas SM/SN ratings.

If the Jeep gets driven on the highway only, then a 30 weight would be fine. If it sees a lot of idle time (like on trails), then a 40 weight would be better. Id just run a 40 weight anyways, due to these engines running well on them, and being a 40 year old engine design.
_________________________
17 Chrysler Pacifica Mobil 1 5W30
13 Yamaha XT250 Valv MC 10W40
12 Suzuki S40 Rotella 15W40
10 Acura TSX 2.4 PZL Plat 5W30
06 GMC Sierra Nextgen 10W30



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#4591928 - 12/02/17 10:26 AM Re: 2004 Rubicon Oil [Re: mmohr]
Nick1994 Online   content


Registered: 02/19/13
Posts: 10133
Loc: Phoenix, AZ
Any old 10w30 would work fine. My 4.0L sits a lot, only 3,000 miles a year or so.

If you're gonna drive it in the freezing cold, use a 5w30.
_________________________
2015 Hyundai Sonata 2.4L 79k PU 5w30 & OEM
2000 Toyota Camry 2.2L 228k M1 AFE 0w30 & Wix
1996 Jeep Cherokee 4.0L 146k M1 HM 10w40 & Fram Ultra

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#4591930 - 12/02/17 10:28 AM Re: 2004 Rubicon Oil [Re: mmohr]
BrocLuno Offline


Registered: 09/06/15
Posts: 5528
Loc: Kalifornia Kollective
Premium full syn for 3K - um, I'd prolly go 2 years on a change ...

You are good on Delvac if you want ... But the Amsoil can certainly go a lot longer, and it's good oil smile

Lots of good oils out there. Most any of the Euro spec 0W-30's or 0W-40's would be up to the task. Take your pick. You are certainly not beating on the oil. That motor is not hard on oil smile
_________________________
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

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#4592058 - 12/02/17 01:02 PM Re: 2004 Rubicon Oil [Re: mmohr]
mmohr Offline


Registered: 12/16/16
Posts: 12
Loc: Pennsylvania
How about this?? Or the Delvac better?

Amsoil Signature Series Max-Duty Synthetic Diesel Oil 5W-40

https://www.amsoil.com/shop/by-product/m.../?code=DEOQT-EA


Edited by mmohr (12/02/17 01:03 PM)

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#4592254 - 12/02/17 04:59 PM Re: 2004 Rubicon Oil [Re: mmohr]
fins Offline


Registered: 07/19/06
Posts: 115
Loc: ohio

I have a 2005 Rubi .....for many years I ran 15w-40 Rotella about 2 years ago I switched to a 5w-30 synthetic.

I change oil every 5k or which is about once a year.

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#4592306 - 12/02/17 06:18 PM Re: 2004 Rubicon Oil [Re: fins]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Why are you guys recommending a diesel oil for a gasoline Jeep engine ?
A diesel oil will have soot dispersants that aren't required for this application.

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#4592373 - 12/02/17 07:30 PM Re: 2004 Rubicon Oil [Re: mmohr]
SilverFusion2010 Offline


Registered: 06/29/11
Posts: 1663
Loc: Crawfordville FL
A 10w-40 SN

I'd use M1 HM 10w-40 or M1 0w-40
_________________________
2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30

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#4592631 - 12/03/17 03:52 AM Re: 2004 Rubicon Oil [Re: mmohr]
jongies3 Online   content


Registered: 03/11/16
Posts: 804
Loc: MT
If you're only getting 3k a year why are you wasting money on synthetic? I'd stick either regular Delvac or Rotella 15W-40 in there and change it yearly if it were me. Doesn't the 4.0 still run off a tappet cam instead of a roller? If so, it'll appreciate the extra zinc in the HDEO's over the Amsoil for better wear characteristics. I use Rotella 15W-40 in all my old tappet engines and they love it.


Edited by jongies3 (12/03/17 03:52 AM)
_________________________
2004 Toyota Tacoma 3.4 V6: Mobil 1 AFE 0W-30, FRAM TG-3600 filter
1996 Ford Contour 2.5 V6 QSGB 5W-30, MC FL-500S filter

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#4592664 - 12/03/17 05:50 AM Re: 2004 Rubicon Oil [Re: mmohr]
ChrisD46 Offline


Registered: 09/10/10
Posts: 1904
Loc: GA.
0W40 Castrol Edge is great in a 4.0L Rubicon - but maintaining my son's jeep at 10K mile OCI's .
_________________________
2017 Hyundai Sonata 2.4L GDI 4 cylinder
2010 Hyundai Elantra 2.0L 4 cylinder
2007 Kia Sedona 3.8L 6 cylinder

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#4592775 - 12/03/17 08:25 AM Re: 2004 Rubicon Oil [Re: mmohr]
dlundblad Offline


Registered: 09/30/13
Posts: 10058
Loc: Indiana
I guess my post didn't originally go through.

I like Edge 10w40, but I try to buy it on sale.

My Jeep seems to run quieter on 10w40's. Haven't tried a 15w40, but I will soon.
_________________________
03 Jeep WJ 4.0 199k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 145k Rotella T5 10w30 Fram TG3980


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#4592802 - 12/03/17 08:51 AM Re: 2004 Rubicon Oil [Re: Merkava_4]
bubbatime Offline


Registered: 03/18/08
Posts: 5628
Loc: South Florida
Originally Posted By: Merkava_4
Why are you guys recommending a diesel oil for a gasoline Jeep engine ?
A diesel oil will have soot dispersants that aren't required for this application.


17000 post and still clueless.
_________________________
17 Chrysler Pacifica Mobil 1 5W30
13 Yamaha XT250 Valv MC 10W40
12 Suzuki S40 Rotella 15W40
10 Acura TSX 2.4 PZL Plat 5W30
06 GMC Sierra Nextgen 10W30



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#4592900 - 12/03/17 10:15 AM Re: 2004 Rubicon Oil [Re: mmohr]
Building3 Offline


Registered: 04/30/17
Posts: 85
Loc: Michigan
I am in the same situation as you. 2003 Rubicon with about 3,000 miles a year. I drive it mostly in the winter when the roads are bad and not yet plowed. It is garage kept. It has had Pennzoil since day one. The first seven years when it had the factory warranty the dealer put in the yellow bottle 10w-30. Now I change the oil and filter myself with Pennzoil Ultra Platinum 10w-30. I use the Mopar oil filter. The owner's manual specified 10w-30 so that is what I have used. The oil analysis has been excellent. The powertrain has never had a repair. As a matter of fact, in 14+ years it has only had two repairs of any kind: a rear track bar was replaced (damaged in off-roading) and the passenger front seat belt retractor recliner failed. It has been a great vehicle to own.

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#4593044 - 12/03/17 01:23 PM Re: 2004 Rubicon Oil [Re: bubbatime]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Originally Posted By: bubbatime
17000 post and still clueless.


Since I have more than one post, it's posts, not "post." Now you tell me who's clueless.

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