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View Poll Results: Pick more than one that fits you habit
Pennzoil 7 10.00%
Mobile 21 30.00%
Other Major brand (Valvoline, Castro or Quacker) 26 37.14%
It doesn't matter I use what Brand is on sale 8 11.43%
Conventional 19 27.14%
Semi-Synthetic 5 7.14%
Full Synthetic 29 41.43%
Change Every 3000 Miles or less 20 28.57%
Change Every 4000-6000 miles 35 50.00%
Change over 6000 miles 9 12.86%
Multiple Choice Poll. Voters: 70. You may not vote on this poll

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Old 05-22-2012, 08:04 AM   #1
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Lets talk about Engine Oil for Jeeps

Poll is attached, but feel free to explain what oil brand, type, how many times you change the engine oil and why it works for you and you jeep. This is not a competition its a survey.

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Old 05-22-2012, 08:07 AM   #2
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I use regular dino oil, mobil 5000 and change it about every 3k miles. I use regular purolator oil filters.

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Old 05-22-2012, 09:50 AM   #3
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Mobile 5000

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Originally Posted by wwch99tj View Post
I use regular dino oil, mobil 5000 and change it about every 3k miles. I use regular purolator oil filters.
Just looked for this oil and it looks like it is discontinued
See link: Mobil Clean 5000 5W-30 Conventional Motor Oil
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Old 05-22-2012, 09:54 AM   #4
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Motorcraft in my powerstroke
Castrol in my cummins
Valvoline in all my gas engines, but trying AMSOil in the new one
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Old 05-22-2012, 12:38 PM   #5
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Old 05-22-2012, 12:45 PM   #6
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Mobile One--

Changeat 4000 to 6000 miles- !

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Old 05-22-2012, 01:00 PM   #7
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I use synthetics in my Subaru and Toyota (Torco, Mobil1 EP, Quaker State Ultimate Durability) and regular dino (Pennzoil Yellow Bottle 5W30) in my 2012 JK. It calls for regular 5W30 so I will stick to that. As far as the Jeep goes, I change every 3,000-5,000 miles depening on use, so no need for synthetic anyway. PYB is pretty good oil. The others go around 5,000-7,500 on synthetic.

At some point I may switch the Jeep to synthetic but it worries me that Chrysler calls for regular so I may stick with regular. Regardless, I never use synthetic till ~10,000 miles.
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Old 05-22-2012, 01:19 PM   #8
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My '08 JKUR Chrysler recommends synthetic 75w-140, for off-road/towing/police-etc--


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Originally Posted by HK_Runner View Post
I use synthetics in my Subaru and Toyota (Torco, Mobil1 EP, Quaker State Ultimate Durability) and regular dino (Pennzoil Yellow Bottle 5W30) in my 2012 JK. It calls for regular 5W30 so I will stick to that. As far as the Jeep goes, I change every 3,000-5,000 miles depening on use, so no need for synthetic anyway. PYB is pretty good oil. The others go around 5,000-7,500 on synthetic.

At some point I may switch the Jeep to synthetic but it worries me that Chrysler calls for regular so I may stick with regular. Regardless, I never use synthetic till ~10,000 miles.
No problemo-

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Old 05-22-2012, 01:30 PM   #9
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Everyone I ask say Mobil 1. But at the dealerships I see Pennzoil. In the past Mopar oil which was used the the dealerships was made by Mobile. The Mopar/Mobile deal went away. I wonder if Mopar oil is now supplied by Pennzoil.
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Old 05-22-2012, 01:33 PM   #10
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JIMBOZ- 75W140 in your engine? You mean in the gearbox or diffs, right? Not sure why the 2012 recommends regular oil specifically but 5W30 is common in all my vehicles. 75W90- I use that (Motul or Motorex) in my Subaru diffs.
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Old 05-22-2012, 01:34 PM   #11
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I have seen way too many motors ruined by pennzoil. We as a company used the local quick change place for years until we started having engine issues, they were all plum full of sludge. Any parafin based oil will do that, so me stay away
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Old 05-22-2012, 01:42 PM   #12
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I use Amsoil. Much nicer IMO than conventional.
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Old 05-22-2012, 01:42 PM   #13
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That is not true- not in the past 10-15 years anyway. Some engines (Chrysler's especially) were prone to sludge buildup if oil was not changed frequently. Pennzoil makes among the best oil out there. My old Honda Accord use Pennzoil regular and changed every 5,000 miles. The engine was shiny and I sold it at 159,000 miles. The next owner (my friend) took it to 220,000 miles before totalling the poor car. Had no issues, excellent gas mileage, and if you looked down the engine oil fill area, the components were still shiny and the dipstick was aso shiny. I have also used the other oils with similar results but some engines are prone to sludge buildup. It had become much better recently.
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Old 05-22-2012, 01:45 PM   #14
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Rats-kinda like a Freudian slip-i=I'm sorry, yea I was referring to The manual, recommending syn. for diff. fluid-


Quote:
Originally Posted by HK_Runner View Post
JIMBOZ- 75W140 in your engine? You mean in the gearbox or diffs, right? Not sure why the 2012 recommends regular oil specifically but 5W30 is common in all my vehicles. 75W90- I use that (Motul or Motorex) in my Subaru diffs.
They don't say anything about Dino/syn. for the engins --just 5w-20 (specs) and I don't follow that part-

I use Valvoline syn-75w-140 in the diffs and Mobile One 5w-30 in the engine--thanx for catching my flub !

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Old 05-22-2012, 04:38 PM   #15
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valvoline max life syn blend 10w30 here with a mobile 1 filter, change at 4k

just bought the jeep and fig this was maybe the best for it. has 127k
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Old 05-22-2012, 05:57 PM   #16
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Amsoil XL 10w30, Amsoil oil filter every 7500 miles. Amsoil 75w90 GL-4 in the tranny, Amsoil 75w90 GL-5 in the diffs, and Amsoil ATF in the t/c. All synthetic.
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Old 05-22-2012, 06:08 PM   #17
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Royal purple every 8k. No problems so far.
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Old 05-22-2012, 06:58 PM   #18
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Mobile 1 full Syn.
Change every 5000.
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Old 05-22-2012, 07:59 PM   #19
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Amsoil seems to be by far the best. With their filter its 15-25k depending on the car\driving conditions.

Here is the link to my 2010 Jeep Product page.

2010 JEEP WRANGLER 3.8L 6-cyl Engine Code [1] - AMSOIL Online Product Application Guide
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Old 05-22-2012, 08:24 PM   #20
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Penzoil with a Fram oil filter. I change it every 4 to 5 thousand miles. Which is usually every 6 months.
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Old 05-22-2012, 08:32 PM   #21
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Quote:
Originally Posted by igf1r

Just looked for this oil and it looks like it is discontinued
See link: Mobil Clean 5000 5W-30 Conventional Motor Oil

Mobil super 5000 I get the oil change specials from pep boys 12.99 5 quarts and a filter. Or I get the 5 quart jug from wal mart

http://www.mobil.us/USA-English-LCW/...bil-super.aspx
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Old 05-22-2012, 08:40 PM   #22
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Quote:
Originally Posted by wwch99tj View Post
Mobil super 5000 I get the oil change specials from pep boys 12.99 5 quarts and a filter. Or I get the 5 quart jug from wal mart

Mobil USA | Car Engine Oils | Mobil Super
Thought TJ's took 6 quarts....I know my '04 does
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Old 05-22-2012, 08:48 PM   #23
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Valvoline full Syn fluids in everything.. But I am biased based on the fact my wife works for Valvoline so I(she) get a killer discount at all of their oil change places in KY.
Prev to that I ran Amsoil.

Every 5k miles.
Valvoline or Wix filter, fram won't touch anything of mine.
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Old 05-22-2012, 09:20 PM   #24
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Quote:
Originally Posted by jp2611

Thought TJ's took 6 quarts....I know my '04 does
4 quarts in the 4 banger
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Old 05-23-2012, 03:27 AM   #25
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I've been using synthetic since new 5 W 30 I change it about 6,000-7,000 and I have 60,345 on her now. She runs great.
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Old 05-23-2012, 09:32 AM   #26
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update

It looks the leaders are Other Major Oil brands, Full Synthetic and 4000-6000 miles change interval.
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Old 05-23-2012, 02:57 PM   #27
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Shell Rotella 10w30 and a Wix filter every 3K.
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Old 05-23-2012, 03:39 PM   #28
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I'm using High Milage Vehicle Pennzoil 5W-30 Now as a test for Oil Consumption in my 07 Mexican 3.8L.... So far it's only used 1/2 quart in 620 miles on this change.
When I change, I may try a different brand until I see whats going to run with out dripping out of the tail pipe...
I hate looking in my rear view mirror and seeing the EXON VALDEZ bearing down on me.
Filter is Puralator .... "BH"
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Old 05-23-2012, 07:49 PM   #29
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Since the PO used synthetic, I've continued to use it. Mobil 1 10W-30 in summer and 5W-30 in winter. FWIW I use the Motorcraft (Ford) FL-1A filter.
I was changing oil and filter every 5K but I've extended my OCI to 8-10K. With 133K on the I-6, I still don't need to top it off between changes. I just checked the oil today and didn't need to add a drop at 6500 miles since the last change.
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Old 05-23-2012, 08:16 PM   #30
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Quote:
Originally Posted by Ibuildembig View Post
I have seen way too many motors ruined by pennzoil. We as a company used the local quick change place for years until we started having engine issues, they were all plum full of sludge. Any parafin based oil will do that, so me stay away
Ya.... I have found the same thing,when I used to work in a machine shop and would tear down engines, the ones that used pennzoil had tons of ash sludge build up. Since then I have always used Valvoline racing oil with Wix filters.

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