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Old 07-11-2008, 09:02 AM
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Engine Oil Consumption

Not sure how to let you boyz(girlz) in on this...but the flat 6 will *always* consume more engine oil than the 90 degree(or any positive degree) versions. Period. I saw a petition here about 2 months ago asking Porsche to stop the oil consumption. Classic. Silly really. I started laughing... hehehe. I own a CS, but can tell you...without reservation...the pistons sit in the oil!!! the grooves will leak and the car will always spit out a puff of smoke after a night of sitting. There is no way to stop it. Duh! Am I the only engineer on this site? There is no way, according to the second law of thermodynamics(Think Einstein), that a flat six can NOT burn more oil than a 90 degree (or other positive degree) version. It's impossible. Never. Look...Drive the CS, look great, whatever, but dont kid yourselves into ever thinking that this engine, or any other flat version will not blow smoke. I fly piston airplanes as well and ANYONE with the flat six versions will tell you, that they leak oil. I'm not bashing the horizontally opposed engine...I own one, I'm just saying that acceptance is the first step to recovery. Drive the Cayman, look cool, put oil in it, and shut up. I am and hope you will too.
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Old 07-11-2008, 11:33 AM
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Working in the Healthcare field as I do, (often with Delusional Patients) I am amazed how unaware they are about their own abilities. Most of them 'Fly Planes', 'Know Einstein Intimately' and some even have found the cure for all cancers, as well as being Engineers!

If the original Poster had bothered to read the circumstances surrounding the need for a petition on oil ingestion on the race track, I doubt that they would have written what they did.

Porsche do make an effective air/oil Separator, (which some members have fitted to their Caymans) but do not fit it.

Being Black Flagged after High Speed Left Hand Bends - on an expensive track day is no fun for anyone.

And using a litre of oil in one day, being sucked into the air intake from the standardly fitted (useless) air/oil separator - cannot be good for the engine - nor can be considered 'normal' for a flat six engine.

How about looking and learning, using the search engine, before making pronouncements?
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Old 07-11-2008, 11:39 AM
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emccombs,

It’s early, but I think you will get some heat on this today. The petition you are referring to was not about standing oil after a prolonged engine shutdown, it was about the lack of a true dry sump system on the 987 engine. The engine design can result in a large amount of oil burn when doing certain maneuvers on the track. PAG has documented that this can be a problem with certain tire combinations due to the lateral force created when cornering. I am no expert but I think you missed the point of the petition.
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Old 07-11-2008, 03:18 PM
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Troll? Idiot? Both?

Well, the posters above have pointed out that the petition and most of the other lengthy discussion on oil burning have nothing to do with the typical flat six oil smoke after sitting.

Many of the folks on this site have owned many a Porsche (not me unfortunately) and have repeatedly educated the rest of us on this issue.

The only engineer? Not even close. I am continually surprised at the number of engineers (Mechanical Engineer myself) and scientists that actively participate in this forum. If you truly are an engineer (?), then you should know that the second law has nothing to do with Einstein, nor is it likely applied to oil use in a flat six engine.

If I remember correctly, common use of the 2nd law is to describe the inability to use all energy available and explain the ever increasing disorder in the universe. The latter being the likely effect of your original post.

If you are going to stick around here, then please change your tone and add something constructive.

Cheers,
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Old 07-11-2008, 03:39 PM
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Burning oil? Are you joking?

I just finished a 4,837 mile round trip from Las Vegas to the Porsche Parade in Charlotte, NC... much of it at some pretty high speeds, up and over numerous mountain ranges, and all of it in summer temperatures. My oil level sits right where it was when I left.

As pointed out by the others, you've missed the point of the oil ingestion problems faced by most who put their cars on the track. I've owned seven Prsches over the years and yeah, many times you get a puff of oil smoke on start-up - so what's new?

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Old 07-11-2008, 04:21 PM
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Eccombs,
Don't be so arrogant and condescending. If you are an engineer then I am surprised that you don't understand the relatively unique oil consumption problem with the Cayman, that is if you have bothered to attempt to educate yourself on this forum, or elsewhere. All flat sixes with a dry sump oil system will burn oil? Well for that matter all combustion engines will burn oil, lots of factors and variables affect the oil blow by amount into the combustion chamber despite the orientation of the cylinders.. Agreed? The Cayman oil burning problem is a result of oil being forced into the air intake system due to extreme cornering maneuvers at high rpms, many believe that this is due to a faulty oil separation design.
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Old 07-11-2008, 04:23 PM
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Beez: My oil level gauge is broken too.
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Old 07-11-2008, 04:54 PM
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Just what I'd expect from a Cadillac owner....
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Old 07-11-2008, 05:00 PM
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Talking

A cure for cancer? What planet are you from Dr. The medical field and big pharma will never find a cure for cancer (what a scam on the American public). there is no $$ in the cure but only the treatment of the Dx. As for the engineer quotes that is out of my league, but from reading the forum oil consumption is normal for the cayman.

Quote:
Originally Posted by kareldeeley View Post
Working in the Healthcare field as I do, (often with Delusional Patients) I am amazed how unaware they are about their own abilities. Most of them 'Fly Planes', 'Know Einstein Intimately' and some even have found the cure for all cancers, as well as being Engineers!

If the original Poster had bothered to read the circumstances surrounding the need for a petition on oil ingestion on the race track, I doubt that they would have written what they did.

Porsche do make an effective air/oil Separator, (which some members have fitted to their Caymans) but do not fit it.

Being Black Flagged after High Speed Left Hand Bends - on an expensive track day is no fun for anyone.

And using a litre of oil in one day, being sucked into the air intake from the standardly fitted (useless) air/oil separator - cannot be good for the engine - nor can be considered 'normal' for a flat six engine.

How about looking and learning, using the search engine, before making pronouncements?
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Old 07-11-2008, 05:16 PM
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Quote:
Originally Posted by emccombs View Post
Not sure how to let you boyz(girlz) in on this...but the flat 6 will *always* consume more engine oil than the 90 degree(or any positive degree) versions. Period. I saw a petition here about 2 months ago asking Porsche to stop the oil consumption. Classic. Silly really. I started laughing... hehehe. I own a CS, but can tell you...without reservation...the pistons sit in the oil!!! the grooves will leak and the car will always spit out a puff of smoke after a night of sitting. There is no way to stop it. Duh! Am I the only engineer on this site? There is no way, according to the second law of thermodynamics(Think Einstein), that a flat six can NOT burn more oil than a 90 degree (or other positive degree) version. It's impossible. Never. Look...Drive the CS, look great, whatever, but dont kid yourselves into ever thinking that this engine, or any other flat version will not blow smoke. I fly piston airplanes as well and ANYONE with the flat six versions will tell you, that they leak oil. I'm not bashing the horizontally opposed engine...I own one, I'm just saying that acceptance is the first step to recovery. Drive the Cayman, look cool, put oil in it, and shut up. I am and hope you will too.
Remove foot from mouth and try again. I realize you are a relatively new member here and are prone to making a mistake like this, but please, do some research and reading here first before spouting off with the "I know more than you do" attitude that is coming across from your post. This site is about HELPING people, what is it about your message that you are suggesting will "help" some other member here?
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Old 07-11-2008, 06:14 PM
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Quote:
Originally Posted by Jim Michaels View Post
Beez: My oil level gauge is broken too.
You know, Jim... I was thinking that, too... (kidding)

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Old 07-11-2008, 06:24 PM
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Quote:
Originally Posted by Jim Michaels View Post
Beez: My oil level gauge is broken too.
Quote:
Originally Posted by beez View Post
You know, Jim... I was thinking that, too... (kidding)

brad
You know this wouldn't be an issue is we had a proper dip-stick...
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