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Whats the logic of behind 10-20k oil changes

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  #16  
Old 06-15-2009 | 07:24 AM
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Originally Posted by 1999Porsche911
The frequency of oil changes is meaningless if you are using the wrong oil to begin with. With manufacturers reformulating their oils by reducing ZDDP levels, you are unecessarily adding to the wear of your engine if you use Mobil 1 0W40. Not only was the old 0W40 formulation poor at protecting your engine, but now it is worse.

Use an oil of the correct viscosity and a ZDDP level of 1200 or more. There are numerous oils available that have this level of anti-wear additives or you can use an additive to raise the level.

COuld you please post the brand and name of these oils???
Thanks in Advance
 
  #17  
Old 06-15-2009 | 07:29 AM
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I was always told that on a turbocharged car, ~5k miles is a good interval to change the oil at, and on a non-turbocharged to do it more like 7500-10k miles.

That said, I think changing the oil the first 2-3k miles, regardless of turbo or not, is a good idea. As an engine breaks in, I'd imagine there is a large amount of debris that comes loose and goes into the oil system. While the filter obviously picks up a large degree of it, one must remember that filters only catches particles of a certain size or larger. It is almost a guaranty that there are metallic particles in the oil system too small for the filter to capture, that could possibly be damaging the engine.
 
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Old 06-15-2009 | 08:15 PM
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Here is an interesting web page I found in regard to intermediate shaft failure. While its off topic in the sense of this post, its relevence is the information regarding the different wear additives in todays engine oils. http://www.lnengineering.com/ims.html. The oil information will be in the 3rd paragraph from the top. Within that paragraph are 2 hyper links. Hit them for further reading. You may be suprised what you read.
 
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Old 06-15-2009 | 09:09 PM
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Originally Posted by Michael2364
Here is an interesting web page I found in regard to intermediate shaft failure. While its off topic in the sense of this post, its relevence is the information regarding the different wear additives in todays engine oils. http://www.lnengineering.com/ims.html. The oil information will be in the 3rd paragraph from the top. Within that paragraph are 2 hyper links. Hit them for further reading. You may be suprised what you read.

Really good stuff here. Nice find !!

I'm telling you, CHEAP INS.
 

Last edited by Sweeper; 06-15-2009 at 09:11 PM.
  #20  
Old 06-15-2009 | 09:27 PM
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I use MOTUL in my 997s.

I have had the car about 1 year and 10k miles.

I have changed the oil 3 times.

Like sweeper says, CHEAP INSURANCE!

I rather change too often then not often, enough. These are $100K cars we are talking about!
 
  #21  
Old 06-16-2009 | 01:10 AM
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If you want to know oil, go to www.bobistheoilguy.com.

Amsoil is the best oil that money can reasonably buy in the U.S.

Furthermore, for a modern, normally (non tracked) car using modern API/ACEA oil, anything less than a 5,000 mile/yearly oil change interval is pointless, especially when considering the large sump that Porsches have.
 
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Old 06-16-2009 | 04:04 PM
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I follow the Manufacturer's specs for oil changes and find it interesting that people want to to cling to 1950's era intervals with 21st century cars! Look at how much cars have improved , particularly when it comes to reliability and you think oils haven't improved along with the rest of the auto industry?

It is amazing these threads always seem to mention BLACKSTONE LABS! Is this an Amway deal or something? They will of course tell you that you must rely on oil sampling to make sure you do not ruin your engine by following the dumb manufacturer's schedule? Of course they profit by sowing these seeds of doubt and of course if you follow their suggestions all will be fine, but I've got news for you, IT WILL BE FINE ANYWAY!
 
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Old 06-16-2009 | 04:35 PM
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Back in the 90's I had a Land Rover Discovery V8. The old Buick engine that Rover re-birthed and kept using literally for decades.

Anyway, I was slack with oil changes and let them go 15-20,000Km (what's that - 9-12,000 miles?) but did use good oil. The damned thing wore out its camshaft after 140,000kms (say 90,000 miles) and you should have seen the gunk in the system.

All I can put that down to is a very old design with poor oil circulation. And my laziness of course!

I'm only really relating this story as an example of how engine design has moved on over the last 20-30 years.
 

Last edited by aggie57; 06-16-2009 at 05:02 PM.
  #24  
Old 06-16-2009 | 04:47 PM
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Great......for the past 10 years I've been giving my engines the wrong oil, too often.
The AMG is scheduled to get more 0W-40 M1 on Thurs.
Now I read it's only a tad better than pond water.

I dont think I'll sleep well tonight.
 
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Old 06-16-2009 | 04:51 PM
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Originally Posted by GreggT
Great......for the past 10 years I've been giving my engines the wrong oil, too often.
The AMG is scheduled to get more 0W-40 M1 on Thurs.
Now I read it's only a tad better than pond water.

I dont think I'll sleep well tonight.
All things change
 
  #26  
Old 06-16-2009 | 05:46 PM
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The scary part is that Mobil 1 isn"t the same stuff that put them on the map. With the reduction of many beneficial additives, I'm suprised Porsche has not moved to a more modern type of oil i.e. redline royal purple ansoil,ect, which carry a higher % of molly and a more aggressive anti-wear package of additives.It may be time to move to the "unapproved" porsche oils.
 
  #27  
Old 06-16-2009 | 06:55 PM
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really good info. thank you all guys
 
  #28  
Old 06-17-2009 | 02:25 PM
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Originally Posted by 1999Porsche911
Marketing hype. Porsche is able to market their cars with reduced maintenence costs due to less frequent oil changes. It is also to meet specific country' demands for less oil usage. I guess those regulators haven't driven these cars and seen how many gallons of oil some burn up between changes.

Marketing Hype? Really?

Does anyone know anyone who has purchased a Porsche because it has a reduced maintenance cost or a longer oil-change interval? I highly doubt such a person exists.

I feel the 1 year / 10k mile change interval recommended for the newest cars is correct given modern synthetic lubricants and the design and engineering of the modern engines. However, that does not mean you can apply a 2009 MY oil change interval to a 1993 MY car, just by using modern oils.
 
  #29  
Old 06-17-2009 | 03:22 PM
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Originally Posted by Minok
Marketing Hype? Really?

Does anyone know anyone who has purchased a Porsche because it has a reduced maintenance cost or a longer oil-change interval? I highly doubt such a person exists.

I feel the 1 year / 10k mile change interval recommended for the newest cars is correct given modern synthetic lubricants and the design and engineering of the modern engines. However, that does not mean you can apply a 2009 MY oil change interval to a 1993 MY car, just by using modern oils.

Marketing is not only for consumption by the individual but by the industry, rating organizations and regulators.
 
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