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Old 05-30-2012, 08:11 PM   #1
riabreed011
 
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Question oil change interval: mercedes vs my garage

several times i've searched the T1N threads for opinions on this and what i end up with each time is a discussion of what oil to use, not how often to change it, so i am turning to you my roadtrek peers for some help with this.

the manual clearly says change every 10,000 miles. my garage (25 years in service, owner in my friendship community, awards up the wazoo for the best service in SF, years of working on mercedes diesel passenger cars and now doing a couple of small fleets of sprinters and a handful of roadtreks) stubbornly insists that 5k is the right interval for diesel oil changes. says the proper interval is even more crucial in diesels than gas engines.



what say you? what do you?

thanks for any help with this ought-to-be obvious question.

Ria

PS: Have had our 2007 agile for a year now, almost 15,000 miles, loving loving LOVING it!!
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Old 05-30-2012, 10:01 PM   #2
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Default Re: oil change interval: mercedes vs my garage

10K is fine, you can even push past that with a synthetic. I go around 12K, have to make up about 3/4 qt in that time. In my gasser (2001 Honda Odyssey) I go about 11K. Modern oil stabilization packages along with the synthetic molecules do an excellent job at long term lubrication.

Chris
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Old 05-31-2012, 02:16 AM   #3
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Default Re: oil change interval: mercedes vs my garage

I agree with Chris completely.
Your "garage" is pretty much ripping you off.
Changing your oil at half the manufactuer's recommended/mandated interval
suggests either they want your money, or they are a decade or more behind
the current motor oil technology state of the art in their knowledge.
I certainly hope they are using the correct MB BEVO approved synthetic oil
as this will help you get better mileage and longer service from your Sprinter.
If your Sprinter has the Assyst system that monitors oil level and quality,
you do not need to change the oil every 10K miles (as recommended/mandated
in your owners manual for Sprinters without Assyst).
With Assyst, you change the oil when the Assyst wrench shows up on your
dashboard display.
Hope this helps,
Roger
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Old 05-31-2012, 02:29 AM   #4
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Default Re: oil change interval: mercedes vs my garage

If you are worried do a used oil analysis after 5k, then if it is good, do it again at 7500, then at 10 and see how it plays out. My guess is that you will be surprised how good the oil is after 10k.

Icarus
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Old 06-01-2012, 04:59 PM   #5
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Default Re: oil change interval: mercedes vs my garage

I agree with Chris and Roger completely.

IMHO....

The MB oil change interval recommendation was not chosen on a whim. Scores of engineers and scientists at both MB and several of the major oil companies used their combined knowledge of the engine and the oil products to determine the proper interval. Clearly, they know more about their own products than any individual could ever hope to. MB has both their reputation and hundreds of millions of dollars on the line when they recommend the 10,000 mile limit. If anything, they are erring on the conservative side. I personally find it hard to believe that the engineers and scientists were off on their judgment by 100%, and that damage will be done by not changing at 5,000 miles.

Although your friend in SF might be a nice person and well respected, it sounds like he's also a shrewd businessman. Doubling his potential revenue is a nice move!

Of course, if you're part of the 1% and can afford the extra $250+, by all means change it more often. And I'm curious, what is the basis of the nice round number 5,000? Previous recommendation of US auto makers was 3,000 back in the day. If 5,000 is good, wouldn't 3,000 be even better for the engine???

BTW, I recall seeing a post on this forum some time back by an actual MB engineer from Germany who said that the oil change interval MB recommends in Europe is 24,000 miles. FWIW



Oh, to answer your original question of "what do you do?", I change mine at 10K miles.
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Old 06-01-2012, 08:01 PM   #6
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Default Re: oil change interval: mercedes vs my garage

Many forum members here have signed up for oil analysis and posted their results. Try the search bar. Nobody has yet questioned the 10k interval, a few have found going much beyond 12k-15k might not be a good idea - my recollection.
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Old 06-01-2012, 11:53 PM   #7
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Default Re: oil change interval: mercedes vs my garage

The local Dodge stealership insisted on 3000 mile changes! Based on "we don't pay any attention to that computer". I've run anywhere from 14,000 to 16,500 miles on Mobil 1. Will be interesting to see how the Amsoil does. Bloody expensive stuff!
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Old 05-30-2013, 07:33 PM   #8
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Default Re: oil change interval: mercedes vs my garage

Hi guys,

After reading all your helpful comments, what about the oil change was done 2 1/2 years ago but only has 5,000 miles on the oil as it was parked. Does the oil go bad after a long period time sitting? Do I need to change the oil when parked for a long time regardless how many miles it has on? Please comment.
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Old 05-30-2013, 08:58 PM   #9
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Default Re: oil change interval: mercedes vs my garage

I would probably change it. A few dollars worth of insurance,

The oil itself doesn't go bad, but it absorbs moisture and if it never gets run, and seldom gets hot, "boiling" the water out of the oil doesn't happen.

Icarus
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Old 05-31-2013, 04:41 PM   #10
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Default Re: oil change interval: mercedes vs my garage

Hi Icarus,

Thank you very much for the advice.
My Dodge dealer is charging $179 plus applicable taxes. Is this a good price?

Thanks again.
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