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  #13  
Old 08-29-2013, 11:46 AM
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Re: 2014 - 6,000 mile maintenance?

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Originally Posted by Sh0rtBus View Post
My comment wasn't so much about color or smell, but more about oil thickness and viscosity. Thinner oil obviously provides less protection against heat and friction.
So, just to be clear, I have no idea what I'm talking about.

But, while logic suggests thinner oil provides less protection, that does not necessarily mean that it provides inadequate protection. The thinner oil may well still be suitable to the task. Perhaps the initially thicker oil is suggested so as to offer a reasonable lifetime between oil changes.

That is, in theory, "new" thinner oil could be used at an oil change, but that oil would most certainly not offer the same lifespan as the factory specified oil.

But since the thicker oil it used, it can "wear longer" while providing adequate protection to the mechanism.

Like I said, I am neither an automotive engineer, or a petroleum chemist. I don't play one on TV, and I didn't stay in a Holiday Inn last night, but I figured I'd toss this log on the fire anyway as an uninvolved (save that I, too, have my oil changed) observer.
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  #14  
Old 08-29-2013, 12:08 PM
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Re: 2014 - 6,000 mile maintenance?

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Originally Posted by ColoradoJeep View Post
My neighbor is a retired motor oil engineer and he says 10K miles is NUTS! Change oil every 5-6 K miles is a good compromise and, as others have said, very cheap insurance if you are going to keep the vehicle.
Maybe they have made improvements since he retired.

Sometimes acceptance of 'new, improved' is hampered by old school thinking. I hear that some people think the earth is round ...



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  #15  
Old 08-29-2013, 12:27 PM
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Re: 2014 - 6,000 mile maintenance?

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Originally Posted by JC_0105 View Post
Just received this from the dealer where I purchased my Jeep.

"According to our records, your Grand Cherokee may now be due for a 6,000 Mile Service.

Our trained technicians will change your engine oil & filter and perform all the recommended maintenance listed in your owner's manual as well as inspect other safety related components. Proper maintenance with genuine factory parts helps keep your Grand Cherokee operating at peak performance."

Looking in the manual I see nothing about a 6k service. Is this legit or a dealer trying to make more money by getting people to come in before the 10k/12 month oil change?
A charitable answer would be that possibly the dealer is using old software, not aware of the current maintenance schedule.

Another charitable answer would be that they presume you drive your GC up the vertical walls of the Sears Tower on a regular basis, plus run the Rubicon--the river, not the trail.

Or, they are simply trying to sell you something the engineers don't think you need in order to increase income.
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  #16  
Old 08-29-2013, 12:31 PM
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Re: 2014 - 6,000 mile maintenance?

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Originally Posted by Sh0rtBus View Post
Honestly, no. So that does add validity to what the owner's manual recommends. And most manufacturers these days, domestic and foreign, are recommending longer intervals in the 10k range.

But to add some validity to my side...have you seen 5,000 mile oil? Aside from being pretty dark/black, it tends to be quite a bit thinner than fresh oil, which of course affects how well it protects your engine. Not to mention, I start noticing a slight drop in fuel economy close to that point, too.

Everyone obviously has their own preference and will do what they want. Just adding in my two cents based on past experiences. I can tell you without a doubt that I will never go 10,000 miles or 12 months without changing the oil in my vehicle. It ain't hap'nin!
A small problem with a visual inspection of oil.
Its technically worthless.
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Old 08-29-2013, 01:01 PM
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Re: 2014 - 6,000 mile maintenance?

Unless there is something wrong inside your engine 5k miles is just a waste of money. Get an oil analysis done at 5k miles and see what they say. Blackstone labs and they are many others I m sure.
You also can't visually inspect oil, my diesel trucks the oil turns black as soon as you pour it in I think but oil analysis tells a different story.
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Old 08-29-2013, 01:42 PM
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In the UK almost all modern vehicles have a manufacturers recommended service interval of 12 months or 10K miles whichever comes first. However I know a lot of people still like to change the oil more frequently!
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Old 08-30-2013, 09:33 AM
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Re: 2014 - 6,000 mile maintenance?

I dont care what anyone says but i would never wait 12k for an oil change , just as mentioned before 5-6k is reasonable .
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Old 08-30-2013, 10:32 AM
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Re: 2014 - 6,000 mile maintenance?

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Originally Posted by Sh0rtBus View Post
Sorry, but 10,000 miles/12 months is entirely too long to wait to change your oil. Even if you're running full synthetic.
Especially the german cars with full synthetic oils have intervals longer than 10k miles like 12-13k miles.
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Old 08-30-2013, 11:24 AM
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Re: 2014 - 6,000 mile maintenance?

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Originally Posted by hemi15 View Post
Especially the german cars with full synthetic oils have intervals longer than 10k miles like 12-13k miles.
I had an '08 VW R32 before I got my Wrangler and I changed the oil in it every 5k miles, too. Of course I had it done at the dealership, but I also knew the service manager personally since I used to work with her and her husband for another manufacturer.

I'm sure following the owner's manual will not hurt your vehicle, but I'll continue to change my oil every 5k miles just to ensure I get the most performance/fuel economy/life out it that I can. I don't see either of my Jeeps going anywhere any time soon.
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Old 08-30-2013, 12:02 PM
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Re: 2014 - 6,000 mile maintenance?

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Originally Posted by Sh0rtBus View Post

I'm sure following the owner's manual will not hurt your vehicle, but I'll continue to change my oil every 5k miles just to ensure I get the most performance/fuel economy/life out it that I can.
This will come out wrong, it's not meant to, but it's the internet, so...

What's fascinating about the comments on this thread is that, apparently, what the manual says is AGAINST the "performance/fuel economy/life" of the vehicle. That the the maintenance is extended over the "norm" with disregard for the performance/fuel economy/life of the vehicle. That the manual is simply wrong and not in your best interest as a vehicle owner.

The JGC manual says "change it when the light goes on or 10K miles, whichever comes first".

So, for all of you religious oil changers, are you going to ignore the light if it comes on early, but pre-suppose that it's wrong/broken/misguided if it's not on by 5K (or whatever) miles?

Now I understand that the "light" doesn't know what oil it's using (synthetic vs regular), and that if you run a different type of oil then we, as tool using humans, may "know better" than the light. The book says whether you run normal or synthetic, to follow the light and 10K limit.

But the basic premise is still interesting. That the manual is out right wrong, and not to be trusted.

For example, I was surprised to see that the radiator fluid has a 10 yr/120K mile life span. Wow. Do folks ignore that guideline too?

Just a curious observation is all.
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Old 08-30-2013, 01:34 PM
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Re: 2014 - 6,000 mile maintenance?

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Originally Posted by aedubber View Post
I dont care what anyone says but i would never wait 12k for an oil change , just as mentioned before 5-6k is reasonable .
Thats good, as the owners manual says never to go over 10K.

A cynic might wonder if that's just so folks whose oil reminders are on the fritz would not have an excuse.
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Old 08-30-2013, 02:14 PM
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Re: 2014 - 6,000 mile maintenance?

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Originally Posted by whartung View Post
This will come out wrong, it's not meant to, but it's the internet, so...

What's fascinating about the comments on this thread is that, apparently, what the manual says is AGAINST the "performance/fuel economy/life" of the vehicle. That the the maintenance is extended over the "norm" with disregard for the performance/fuel economy/life of the vehicle. That the manual is simply wrong and not in your best interest as a vehicle owner.

The JGC manual says "change it when the light goes on or 10K miles, whichever comes first".

So, for all of you religious oil changers, are you going to ignore the light if it comes on early, but pre-suppose that it's wrong/broken/misguided if it's not on by 5K (or whatever) miles?

Now I understand that the "light" doesn't know what oil it's using (synthetic vs regular), and that if you run a different type of oil then we, as tool using humans, may "know better" than the light. The book says whether you run normal or synthetic, to follow the light and 10K limit.

But the basic premise is still interesting. That the manual is out right wrong, and not to be trusted.

For example, I was surprised to see that the radiator fluid has a 10 yr/120K mile life span. Wow. Do folks ignore that guideline too?

Just a curious observation is all.
Not arguing your point by any means and no it doesn't come out wrong. And I'm not saying that the owner's manual is wrong. But consider this:

The owner's manual was written by engineers who work for Chrysler. Chrysler is in the business of building cars? Why? To make a profit from selling cars. They don't care how often you service your vehicle because it's not making them any more money. At least not until it's out of warranty and parts start failing. Again, not saying that's the case and the manual is wrong; just a thought.

I will say, though, that there will be no winner/loser in this debate. Unless of course someone has done a study on the longevity of a vehicle engine where they change the oil in one vehicle at shorter intervals and another at longer intervals and see which one lasts longer. Maybe the difference is negligible....
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