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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?
 

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I found out early on when I purchased my 2005 G.C., that the dealer maintenance schedule is different than what the manual suggests. I follow the owners manual recommendations. Since I don't do a lot of driving I plan on changing my oil twice a year, I don't think thats over or under kill. I believe it was the axle fluid that called for inspection in the manual at around 20,000 miles, writer told me it was due for replacement.
 

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My salesman said he is always fighting with his service manager. The salesman recommends following the evic/manual schedules. The service manager tells everyone that they need to change the oil every 3,000 miles. That was my first clue that I needed to use a different dealer for service.


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Coming from being a service advisor for 8 years, I don't agree with either camp on oil change intervals. Sorry, but 10,000 miles/12 months is entirely too long to wait to change your oil. Even if you're running full synthetic. But with today's engines, 3,000 miles is way too often unless you're just beating on your vehicle and keeping your foot in the skinny pedal all the time. Or if you tow heavy loads a lot. Otherwise, on regular organic motor oil, I'd go every 5,000 miles, and maybe stretch to 7,500 for full synthetic. For my vehicles, they get full synthetic and it gets changed every 5,000-6,000 miles. If you need justification for a reason to deviate from what the owner's manual says, just consider it cheap insurance. It certainly isn't going to hurt the vehicle to change your oil sooner than the manufacturer recommends and definitely won't void your warranty.
 

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Coming from being a service advisor for 8 years, I don't agree with either camp on oil change intervals. Sorry, but 10,000 miles/12 months is entirely too long to wait to change your oil. Even if you're running full synthetic. But with today's engines, 3,000 miles is way too often unless you're just beating on your vehicle and keeping your foot in the skinny pedal all the time. Or if you tow heavy loads a lot. Otherwise, on regular organic motor oil, I'd go every 5,000 miles, and maybe stretch to 7,500 for full synthetic. For my vehicles, they get full synthetic and it gets changed every 5,000-6,000 miles. If you need justification for a reason to deviate from what the owner's manual says, just consider it cheap insurance. It certainly isn't going to hurt the vehicle to change your oil sooner than the manufacturer recommends and definitely won't void your warranty.
I know there is all sorts of advice on oil changes. Most comes from people with no automotive background. Since you actually have spent some time on the front line, let me ask. In your eight years, have you seen any/many motors fail while following the manufacturers recommendation?



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I know there is all sorts of advice on oil changes. Most comes from people with no automotive background. Since you actually have spent some time on the front line, let me ask. In your eight years, have you seen any/many motors fail while following the manufacturers recommendation?



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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!
 

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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!
I agree with your earlier statement, it is pretty cheap insurance.
More frequent oil changes may even help if the vehicle is going to have a long life with extremely high mileage.

For someone who will keep a vehicle for three to five years driving around 10,000 miles a year, I'm not sure there is much advantage.

Thank you for your honest reply. :thumbsup:
 

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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.
Actually, according to Edmunds... No, no it doesn't add validity and is incorrect. :D
Stop Changing Your Oil! - Edmunds.com

According to them, and apparently the manufacturer, oil retains its lubrication and protective properties well after it changes color, etc. And there is no way to tell, based on sight or smell, how much life is left in the oil. Only lab testing will do that. Also, according to them, the oil life systems are pretty accurate.

Whether you believe them or not, that's up to you.
 

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Actually, according to Edmunds... No, no it doesn't add validity and is incorrect. :D
Stop Changing Your Oil! - Edmunds.com

According to them, and apparently the manufacturer, oil retains its lubrication and protective properties well after it changes color, etc. And there is no way to tell, based on sight or smell, how much life is left in the oil. Only lab testing will do that. Also, according to them, the oil life systems are pretty accurate.

Whether you believe them or not, that's up to you.
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. I'll give that a good read through, although I doubt it'll change my mind much.
 

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To the OP here....the answer to your 6k mile service is there isn't one. It's a marketing tactic used by the dealership to lure you in to spend money with them. Oil changes and schedule maintenance are the service department's bread & butter. They use those to find other things on the vehicle that may be wrong, or things they can upsell to bring in more money. At 6k miles the only you need to do if you choose not to change your oil is rotate your tires. And that can be done in your own driveway. Or you can take your vehicle to any Discount Tire and they'll do it for you for free. That's their way of earning future business.
 

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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.
 

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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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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 ... :rolleyes:



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Lifer: Old Geezer
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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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Lifer: Old Geezer
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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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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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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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