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Old 11-25-2013, 02:43 PM   #1
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New Oil Thread!

Not what you think; I have a 2013 bought in August 2012. In the first year, I put 20K miles on it, changing the conventional oil (and rotating tires) every 5000 miles. But in August I got a new job that provided a company truck (RAM 2500 Crew w/5.7 Hemi) and as such, I rarely drive my Jeep. As much as I miss driving my JK as a DD, I know that years down the road I will appreciate the low miles my JK has accumulated.

Is conventional (which I think is a perfectly fine motor lubricant) or synthetic better for sitting in the crankcase for extended (time) intervals? I'm talking about not even running the Jeep more than 50 miles a week, typically just running errands on the weekend.

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Old 11-25-2013, 03:04 PM   #2
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Engine oil Conventional, or Synthetic, both have a very long self life. So unless you live in a very cold climate, causing a lot of condensation to build in your oil, then I would just change it once a year.

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Old 11-25-2013, 04:54 PM   #3
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A YEAR? Really?
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Old 11-25-2013, 05:09 PM   #4
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A YEAR? Really?
Yeah, a year. That's the standard shelf life of oil additives.
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Old 11-25-2013, 05:34 PM   #5
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Yeah, a year. That's the standard shelf life of oil additives.
That I understand, but it won't be on the shelf, it will be in a crankcase with burned fuel byproducts, humidity, etc...

I guess I have just heard "3 months or 3,000 miles" for so many years.
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Old 11-25-2013, 05:35 PM   #6
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Read the owners manual. If it lists a shorter interval, like every 6 months, follow that. Leave NO chance for the stealership to deny any warranty due to NOT following the owners manual.
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Old 11-25-2013, 05:49 PM   #7
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A YEAR? Really?
Yes, your oils TBN, is not going to break down in 2,600 miles a year. As I already stated, the only concern is condensation in cold damp climates.
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Old 11-25-2013, 08:22 PM   #8
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For a 13 Chrysler indicates at least once a year, whether you drive it or not. For my 10 with a 3.8 it's every 6 months. That's what's in the book at the minimum. There's also mileage considerations, based upon the year you have. Oil changes were extended with the 3.6.
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Old 11-25-2013, 08:26 PM   #9
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Cool, thanks. I was thinking 6 months, just wanted to bounce it of you guys without starting an oil war, 2dr vs. 4dr, auto vs. man, etc.....
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Old 11-26-2013, 07:44 AM   #10
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I would never be able to find link. But there was a guy on bobistheoilguy who had a Porsche that was 5 years old with only 6K miles on it. Still had the factory fill in it. He changed the oil and had a UOA performed. It was fine.
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Old 11-26-2013, 08:12 AM   #11
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"I guess I have just heard "3 months or 3,000 miles" for so many years."

Don't fall prey to the Jiffy-Lube myth...
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Old 11-26-2013, 10:15 AM   #12
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"I guess I have just heard "3 months or 3,000 miles" for so many years."

Don't fall prey to the Jiffy-Lube myth...
Jiffy Lube ain't getting no where near my Jeep.
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Old 11-26-2013, 11:52 AM   #13
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Jiffy Lube ain't getting no where near my Jeep.
God I hope not. My son worked at one of those Jiffy Lube type places when he was in high school. He tried to always do the right thing. But the other older guys would do stuff like not change hard to get to oil filters. When my son would question it they were like who cares. The customer is never gonna know. If someone put in the wrong oil. Who cares thhe customer is never gonna know. If someone isnt going to change their own oil they should always go to the dealer. They will be better trained and if something does go wrong they are more likely to make it right.
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Old 11-26-2013, 02:44 PM   #14
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The owners manual will give you oil change intervals for miles and time.
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Old 11-26-2013, 03:07 PM   #15
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Just FYI, my dealer told me the oil change interval that the computer uses for the reminder is based on synthetic oil, which is about twice as long as conventional.
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Old 11-26-2013, 04:38 PM   #16
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Just FYI, my dealer told me the oil change interval that the computer uses for the reminder is based on synthetic oil, which is about twice as long as conventional.
I'm fully aware dealer's imaginations work overtime but that's a new one on me. Sometimes I just can't believe they can say these things with a straight face.
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Old 11-26-2013, 04:44 PM   #17
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Just FYI, my dealer told me the oil change interval that the computer uses for the reminder is based on synthetic oil, which is about twice as long as conventional.
I'll say your dealer is wrong to be nice. What I should say is that your dealer is F. O. S. If you think about it, no JK leaves the factory with full synthetic motor oil. And, unless you specifically ask for it and pay more, dealers don't use synthetic motor oil when they change the oil for service. The computer uses a logarithm that is duty based which monitors speed, rpm's, mileage, start cycles, engine temp, transmission (auto only) etc., etc. Then the logarithm gives a general determination as to when the oil change indicator gets tripped. In theory, using full synthetic motor oil could cause the system to extend the oil change indicator but there are too many variables to definitely say that this occurs. The dealer saying that it's geared towards synthetic oil is nonsense.
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Old 11-26-2013, 05:02 PM   #18
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Just FYI, my dealer told me the oil change interval that the computer uses for the reminder is based on synthetic oil, which is about twice as long as conventional.
Your dealer is lying to trick you into paying for oil changes every 3k.
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Old 11-26-2013, 09:06 PM   #19
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In the motorcycle world regular oil is recommended to be changed at the beginning of winter and in the spring before use. There is concern over acid buildup due to condensation and particulates the oil holds which can damage the engine. I do not know about synthetics but your idea of every six months makes a lot of sense.
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Old 11-26-2013, 09:23 PM   #20
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I'll say your dealer is wrong to be nice. What I should say is that your dealer is F. O. S. If you think about it, no JK leaves the factory with full synthetic motor oil. And, unless you specifically ask for it and pay more, dealers don't use synthetic motor oil when they change the oil for service. The computer uses a logarithm that is duty based which monitors speed, rpm's, mileage, start cycles, engine temp, transmission (auto only) etc., etc. Then the logarithm gives a general determination as to when the oil change indicator gets tripped. In theory, using full synthetic motor oil could cause the system to extend the oil change indicator but there are too many variables to definitely say that this occurs. The dealer saying that it's geared towards synthetic oil is nonsense.
Algorithm, and oil type can be a constant. Some general info (not directed at you). You just can't expect the same duty cycle out of conventional and synthetic. Whether chrysler is using conventional, synthetic or a midpoint between the two for the computer, is not essentially impossible. You need to know what type of oil you will be using to trigger the reminder at the right time. A car that is driven a lot, may go longer with synthetic than conventional. Maybe JKs are programmed with conventional, I don't know, but oil type can be a constant. Same as weight. 5W-40 may or may not last longer than 5W-30, usually longer. A car driven hard for 8K may trigger an alert at that point if programmed for conventional, but programmed for synthetic it may trigger at 10K. Same goes for weight.

It has nothing to do with which oil is better, its simply programming. It's logical that you do need to know oil type to trigger the alarm, specially when longevity is not the same between synthetics and conventional. Maybe what the tech said is actually the opposite. JKs may be programmed for conventional, and you may go a few extra miles after the reminder if you are using synthetic. Since the computer is programmed for conventional, it assumes based on your duty cycle that the oil may need changing, but it does not, since its synthetic. It can be a generic set of variables and constants, maybe the oil type is a multiplier calculated by averaging the life of a set of conventional and synthetics oils. Don't know, but its not absurd that the type of oil may be used for the computer and could in fact be one of the major points in whether the alarm is triggered or not.

Either way, the computer reminder is a joke. Some guys have had it pop up after 20k miles. I mean come on.
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Old 11-26-2013, 09:25 PM   #21
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You definitely want to run a quality synthetic (Buy Mobil1 from Walmart...$25 or a 5 quart jug + 1 quart) and change it once a year. Conventional oil turns acidic much faster than synthetic.
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Old 11-26-2013, 09:35 PM   #22
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You definitely want to run a quality synthetic (Buy Mobil1 from Walmart...$25 or a 5 quart jug + 1 quart) and change it once a year. Conventional oil turns acidic much faster than synthetic.
FYI - basic Mobil 1 as sold in Walmart does not meet Chrysler certification. Some of their higher grades of Mobil 1 synthetics do and have the Chrysler certification on the jugs. So if you are still under warranty.....
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Old 11-26-2013, 09:48 PM   #23
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FYI - basic Mobil 1 as sold in Walmart does not meet Chrysler certification. Some of their higher grades of Mobil 1 synthetics do and have the Chrysler certification on the jugs. So if you are still under warranty.....
We already had this discussion in many oil threads...it doesn't meet chrysler specs only because chrysler changed their specs, and Mobil didn't have a chance to recertify the oil. Mobil1 is still FAR superior to all oil used by chrysler, and the oil lacking certification has nothing to do with the actual oil quality, it is simply paperwork. If Mobil is good enough to be the standard oil for Rolls Royce, AMG, BMW, Ferrari, Bentley, Aston Martin, Koenigssegg, Zonda, and Lamborghini, it sure as hell is good enough for the tickastar.
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Old 11-27-2013, 06:33 AM   #24
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We already had this discussion in many oil threads...it doesn't meet chrysler specs only because chrysler changed their specs, and Mobil didn't have a chance to recertify the oil. Mobil1 is still FAR superior to all oil used by chrysler, and the oil lacking certification has nothing to do with the actual oil quality, it is simply paperwork. If Mobil is good enough to be the standard oil for Rolls Royce, AMG, BMW, Ferrari, Bentley, Aston Martin, Koenigssegg, Zonda, and Lamborghini, it sure as hell is good enough for the tickastar.
Perhaps, but with a 100k warranty or lifetime as in my case, it's really no big deal to use an oil that Chrysler did certify. I'd guess since the more expensive Mobil 1 oils DO meet the certification and it's listed on the container, they could recertify their walmart version if they wanted to. Same thing with Castrol. It used to be a highly preferred Dino oil. Was recommended for a lot of vehicles (Nissan 300Z), but they have not kept up, and only meet Ford specs now I believe, from reading the label. Rather than fight over quality of oil, I just use one that is certified. It removes a big question mark with dealer/Chrysler should I ever have an engine problem, like say a head failure...
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Old 11-27-2013, 10:06 AM   #25
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On a new engine I like to use non-synthetic for the first 5000 miles, changing it twice with filter from new. The idea being the non-synthetic is not as slippery as synthetic thereby allowing the new engine to break-in. Once done synthetic oil is used. Synthetic oil is so much more slippery and resists breaking down from heat and use. Immediate advantages are possible increase on fuel mileage and a smoother running motor. Longterm benefits are a less worn motor as the miles pile on.
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Old 11-27-2013, 10:54 AM   #26
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Mobil 1 is perfectly fine like NFRs indicated. As far as the oil change indicator, Algorithm, Logarithm, I know it's some type of rithm. It's been a long time since I sat in a math class.
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Old 11-27-2013, 10:57 AM   #27
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Check the owners manual. IIRC your warranty requires the oil be changed every 6 months if your OLM doesn't trigger or you don't hit the max allowable miles in the 6 month time period. If you want to preserve the warranty I'd change the oil twice a year. Once the warranty is up, or if you don't care about the warranty, as long as the Jeep is driven 25 minutes or more each time you start it, changing the oil once a year is no problem. The oil has to be brought up to operating temps and held there for about 20 minutes to burn off the condensation the engine produces. If its driven less than 25 minutes I'd either change it every 6 months or get a used oil analysis to monitor the condition of the oil and eliminate the guess work.
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Old 11-27-2013, 01:27 PM   #28
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In the motorcycle world regular oil is recommended to be changed at the beginning of winter and in the spring before use. There is concern over acid buildup due to condensation and particulates the oil holds which can damage the engine. I do not know about synthetics but your idea of every six months makes a lot of sense.
In the boating world the same thoughts prevail. The sulphur that builds up in the oil as a byproduct of combustion draws moisture over the winter and becomes sulphuric acid. Highly corrosive.

Don't really know if it's true or not but it was always a $600 bill in the fall to change both engines and the generator even with minimal hours for the summer.
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Old 11-28-2013, 05:11 AM   #29
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Check the owners manual. IIRC your warranty requires the oil be changed every 6 months if your OLM doesn't trigger or you don't hit the max allowable miles in the 6 month time period. If you want to preserve the warranty I'd change the oil twice a year. Once the warranty is up, or if you don't care about the warranty, as long as the Jeep is driven 25 minutes or more each time you start it, changing the oil once a year is no problem. The oil has to be brought up to operating temps and held there for about 20 minutes to burn off the condensation the engine produces. If its driven less than 25 minutes I'd either change it every 6 months or get a used oil analysis to monitor the condition of the oil and eliminate the guess work.
In the 2014 manual it says NOTE: Under no circumstances should oil change in- tervals exceed 10,000 miles (16,000 km) or twelve months, whichever occurs first. But I've heard the 2013 has different intervals. 12 months seems like a long time to me for oil changes. I like spring and fall at a minimum..

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