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ArgyleDSL
Cute and Cuddly
Premium
join:2002-07-04
Flushing, NY

Why can Porsches go 20K between oil changes?

From the article at
»www.edmunds.com/car-care/stop-ch···&msite=w
-

Today's Oil Goes the Distance
While the car-servicing industry is clear about its reasons for believing in the 3,000-mile oil change, customers cling to it only because they're largely unaware of advances in automotive technology. Among 2010 models, the average recommended oil change interval, based on a normal service schedule, is about 7,800 miles — more than double the traditional 3,000-mile interval. The longest oil change interval is 20,000 miles, for all Porsches. The shortest oil change interval is 5,000 miles in some late-model Toyotas, but the carmaker has begun shifting its fleet to 10,000-mile oil change intervals using synthetic oil.


Even with synthetic oil - i think a hig performance engine would need a change well before 20K?
--
My heart is old, it holds my memories, my body burns a gemlike flame. Somewhere between the soul and soft machine, is where I find myself again


rody_44
Premium
join:2004-02-20
Quakertown, PA
Reviews:
·Comcast

I worked in a fleet environment (132 mack tractor trailors) A computer told us when to change it. Average was around 100,000 miles. So yea oil of today isnt the same as oil of yesterday. Even at 100.000 miles the computer would suggest to change it because of carbon build up not because the oil broke down.



Anonuser

join:2003-01-03
Milwaukee, WI
reply to ArgyleDSL

I use Castrol Edge with Titanium in my vehicles now. At the last oil change, 15,000 miles on the oil in my cube, I did a blackstone labs. Results were, at 15,000, I could have went longer, the oil was good for it.



CylonRed
Premium,MVM
join:2000-07-06
Bloom County
reply to ArgyleDSL

Many, many, many cars can go longer than 3K miles - in fact all of them can. Question is - how good is it to go that long - in the long run? BMW says 15K miles - I would not even remotely consider that. Especially true for those that leave the oil that long but do not change the filter...

BMW started 'lifetime' fluid for many things - not even shade tree BMW mechanics - not the BMW mechanic in Roundel magazine (30+years experience I believe) - would consider any fluid to be lifetime. Well - BMW has defined lifetime at 100K miles. For most owners who get rid of the cars before that are ok and it can go. Anyone who wants to keep the car for 200K+ miles will do fluid changes at a much more reasonable interval.

Lifetime fluid changes came into vogue when luxury car manufacturers started to throw in the first 3-4 years of service at 'no charge'. To keep from having to pay for those changes - they just increased the interval. Again - lots of people hold onto these cars for 3 years then get the newer one and for them - the fluid change interval is fine. But if someone wants it to last 10 years and 150K+ miles - I think they will be sorely disappointed in the results.
--
Brian

"It drops into your stomach like a Abrams's tank.... driven by Rosanne Barr..." A. Bourdain


Bob4
Account deleted

join:2012-07-22
New Jersey
reply to ArgyleDSL

My Honda Civic's owner's manual said 10,000 miles. My new car's computer tells me when to change it based on the way I drive. The first time, it was 12,000 miles.



Doctor Olds
I Need A Remedy For What's Ailing Me.
Premium,VIP
join:2001-04-19
1970 442 W30
kudos:18
reply to CylonRed

said by CylonRed:

Many, many, many cars can go longer than 3K miles - in fact all of them can. Question is - how good is it to go that long - in the long run? BMW says 15K miles - I would not even remotely consider that.

the fluid change interval is fine. But if someone wants it to last 10 years and 150K+ miles - I think they will be sorely disappointed in the results.

With synthetics you can safely go 20K even 25K with the change intervals. This was proven Years ago.
--
What’s the point of owning a supercar if you can’t scare yourself stupid from time to time?

Kearnstd
Space Elf
Premium
join:2002-01-22
Mullica Hill, NJ
kudos:1

I am guessing the filter must have to be changed sooner though.
--
[65 Arcanist]Filan(High Elf) Zone: Broadband Reports



Doctor Olds
I Need A Remedy For What's Ailing Me.
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join:2001-04-19
1970 442 W30
kudos:18

said by Kearnstd:

I am guessing the filter must have to be changed sooner though.

Depends on the filtration level of the filter and it's surface area (aka size). For less than a quart capacity filter, I'd change it at halfway point and add oil to top off system back to full. For over a quart capacity, then it can go as long as the oil. Especially if using Amsoil EaO filters.

»www.amsoil.com/storefront/eao.aspx?1046189
quote:
Ea Filters designated with product code EaO are recommended for 25,000 miles/one year, whichever comes first, in normal service or 15,000 miles/one year, whichever comes first, in severe service.
--
What’s the point of owning a supercar if you can’t scare yourself stupid from time to time?


CylonRed
Premium,MVM
join:2000-07-06
Bloom County
reply to Doctor Olds

With the BMW CCV system a person would have to be a couple cards short of a full deck - imho - to do that. Of course I already said they (any car) *could* go that long but I don't know any mechanic (shade tree, or very experienced) would do that. Even if the mechanic does NOT have a shop (Mike Miller at Roundel who has an old school maintenance schedule for anyone who has a BMW.

He is not a believer in waiting 100K to change fluids and 15K to change oil if a person is really interested in keeping their BMW (but in reality ANY car) for a long time.
--
Brian

"It drops into your stomach like a Abrams's tank.... driven by Rosanne Barr..." A. Bourdain



Doctor Olds
I Need A Remedy For What's Ailing Me.
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join:2001-04-19
1970 442 W30
kudos:18

said by CylonRed:

With the BMW CCV system a person would have to be a couple cards short of a full deck - imho - to do that. Of course I already said they (any car) *could* go that long but I don't know any mechanic (shade tree, or very experienced) would do that. Even if the mechanic does NOT have a shop (Mike Miller at Roundel who has an old school maintenance schedule for anyone who has a BMW.

He is not a believer in waiting 100K to change fluids and 15K to change oil if a person is really interested in keeping their BMW (but in reality ANY car) for a long time.

You are talking about transmission fluid while this thread is about engine oil change intervals. Synthetic oils have proven themselves in engines for decades now. Lab results don't lie.

Case Studies
BMW and Volvo – The Truth About Lifetime Transmission Fluids
»www.atlanticmotorcar.com/case-st···-fluids/
quote:
There is a trend with many manufacturers to use so called “Lifetime” transmission fluids in their new cars. Audi, BMW and Mercedes have been doing this for years, Volvo more recently.The real question is what is a “lifetime”? If the lifetime of the car is the reference point, most owners will be sorely disappointed, for it seems to us that almost all of the fluids need service between 80-100K miles, far shorter than the lifetime of most European cars. While fluids and lubricants have doubtlessly improved over time, we suspect that the real reason for these “lifetime” fluids is the extended service intervals of new cars.
--
What’s the point of owning a supercar if you can’t scare yourself stupid from time to time?


CylonRed
Premium,MVM
join:2000-07-06
Bloom County

I talked about ALL FLUIDS including oil. CCV = crank case ventilation and relates directly to engine oil.

I will trust a guy who has 30+ years experience and has zero vested interest in suggesting anything less than 15K-20K miles. As I have said - I know of no one - including engineers - who think that 'lifetime' fluid and 15K mile oil changes are a great idea for the long life of a car - any car. This includes folks owning and working on their cars for well over 30 years and have cars for 200K+ miles.
--
Brian

"It drops into your stomach like a Abrams's tank.... driven by Rosanne Barr..." A. Bourdain



Doctor Olds
I Need A Remedy For What's Ailing Me.
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join:2001-04-19
1970 442 W30
kudos:18

There is no argument from me that you are talking about transmission fluids when the thread is about engine oils.


Bob4
Account deleted

join:2012-07-22
New Jersey
reply to CylonRed

Yeah, that guy obviously knows a lot more than the engineers who design and test the engines.

/sarcasm



CylonRed
Premium,MVM
join:2000-07-06
Bloom County

said by Bob4:

Yeah, that guy obviously knows a lot more than the engineers who design and test the engines.

/sarcasm

LOL - a lot of times those 'guys' find the ISSUES with the design and they manufacturer changes the design.
--
Brian

"It drops into your stomach like a Abrams's tank.... driven by Rosanne Barr..." A. Bourdain


CylonRed
Premium,MVM
join:2000-07-06
Bloom County
reply to Doctor Olds

said by Doctor Olds:

There is no argument from me that you are talking about transmission fluids when the thread is about engine oils.

Nice way to only zero in on ONE fluid I mentioned.... It was part of am example:
" one of a number of things, or a part of something, taken to show the character of the whole"
--
Brian

"It drops into your stomach like a Abrams's tank.... driven by Rosanne Barr..." A. Bourdain


Doctor Olds
I Need A Remedy For What's Ailing Me.
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join:2001-04-19
1970 442 W30
kudos:18

Well lets talk about the BMW CCV system you mentioned, oil change intervals doesn't effect it, as it either works or it quits working as seen in the thread below. It is an overly complex replacement for a PCV system and is basically an oil separator for the crankcase produced oil mist (blowby gases).

CCV(Crankcase/oil Seperator) Fixed!!! w/Pics!!!
»forums.bimmerforums.com/forum/sh···t=923117
--
What’s the point of owning a supercar if you can’t scare yourself stupid from time to time?



Cho Baka
Premium,MVM
join:2000-11-23
there
kudos:2
reply to CylonRed

I expect that most technicians change the oil more often than the scheduled interval.
I do.
--
The talented hawk speaks French.



lostinms
Moo

join:2001-11-29
Grenada, MS
reply to ArgyleDSL

The owners manual for my 1986 mazda 626 says to change the oil every 7500 miles.

last time I change to oil I used synthetic oil.

My wife's 1998 Volvo s70 states if you drive in the city change very 5000 miles if you drive mostly highway then 10000 miles.



ilikeme
I live in a van down by the river.
Premium
join:2002-08-27
Sugar Land, TX
kudos:1
reply to ArgyleDSL

My 2012 CRV has a system that monitors when to change the oil. On average it is about every 10k.