quote:
Originally posted by Doug Hillary:
Hi,
Quadrun1 - in this Country Porsche's attitude is;
"Why the h*** would you want to? The current oil capacity is about 9 litres and the factory recommends 30kkms OCI's. If you are concerned just change the oil sooner"
Other more colourful comments remain closed....!
But it must be said that this engine has an extremely sophisticated lubrication system, a lot of technical capacity and with a lot of "user abuse" in reserve
Many non air cooled Porsche engines have already covered 500k without a rebuild! Many more are between 200k and that figure with zero oil consumption. And not a by-pass filter in sight
In my experience the Porsche factory has always been most conservative and very "positive" about oils and OCI's. Most late model Porsches are very easy on their engine oil
My experience with German Automotive Engineers over many years and having worked for MB on vehicle development, including many visits to Wurth and Sindelfingen, has always confirmed their conservatism. And importantly with an excellent technical comprehension of the motor vehicle and its intended use
I am sure Jeff will make the best decision as he sees it and without my humble input!
Regards
Doug is right-on wrt his comments. I've visited Germany - only once - and just HAD to tour MB. I believe they call it "merc" in Australia but correct me if wrong.
In Europe the auto makers dictate the oil standards, not the lazy oil companies. In North America, API/SAE are in cahoots with each other.
Scary fact: most of the SAE J300 engine oil tests are run on either a Buick 3.8 V6 or on a single-cylinder motor. Like a sophisticated lawnmower motor.
The ACEA A-series specs specify exact motors to run on: MB, VW, Porsche, Peugeot, Citroen, etc. The B-series LD diesel specs call for exact tests on motors made by MB, VW, Peugeot, etc. HD series tests are run on Mack, Cummins, Scania, MAN/MTU, etc.
So companies like VW-Porsche-Audi group dictate VERY precise specs to their clients. In Europe extended oil drains are common. For example, the new VW PD turbodiesel required the development of a new oil: Castrol SLX LongLife II 0W-30. With this oil, 24 month or 50,000km max drains.
Especially Porsche designs an engine and a motor oil as companions to each other: they are designed to complement each other. They have every right to then tell their customer what oil to use. Here in North America we're used to a huge lazy V8 and whatever quart of oil is on sale at Parts Are Us.
Although bypass filters are great for HD diesel trucks to remove all the soot, and certain LD cars and trucks running extended oil drains, something as purposely-engineered and exotic as a Porsche needs caution.
Porsche is very well respected for their attention to detail and their exacting engineering, they do NOT guess or leave things to chance. You pay for this of course, the Cayenne is NOT a cheap car.
Jeffrey, I certainly understand you wanting to get the best life out of this investment, and you sound like a very methodical and caring owner.
Even more so than the average Porsche owner!
See what Porsche recommends, as the last thing I would want to see happen is something that would void your warranty. Have you discussed this with P.O.A.? Your local Porsche dealer??
Please be assured that Mobil 1 0W-40, and ESPECIALLY Mobil 1 15W-50, meet/exceed the exacting European ACEA A3, B3, and B4-02 specs for extreme use and EXTREME extended oil change intervals. Delvac 1 5W-40 is a fine oil, but I can't verify it's on the Approval List.
Jeffrey, like most European car makers, Porsche can demand and does maintain, at its own expense, an Approval List. Please check with them to see if a substitute oil is on the Approval List.
If anything, Mobil 1 15W-50 is far easier and probably cheaper to buy than the 0W-40. It's cold temp ratings are not as good, but unless you exceed what Porsche recommends for the low temp/grade chart, you'll be fine.
Please reference the following URL:
http://www.acea.be
The ACEA specs for Mobil 1 15W-50 are:
"A3 Stable, stay-in-grade oil intended for use in high performance gasoline engines and / or for extended drain intervals where specified by the engine manufacturer, and / or for year-round use of low viscosity oils, and/or for severe operating conditions as defined by the engine manufacturer."
The B3/B5 specs cover LD diesel engines, such as VW, that also require severe extended oil drains and are in severe operating conditions. So please check with Porsche to see what they say about Mobil 1 15W-50.
BTW: Australia also has good engineers. Here in North America, the Muscle Car is back. Pontaic has revived the GTO, a "proper" front engine / rear drive car. It's actually a HOLDEN! Doug, if you don't believe me, go to
www.pontiac.com and look up the new GTO.
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However, the 5w-40 RL is extremely shear stable and I'd just buy one oil for the year. No need for the 10W in my opinion. I agree with your thinking but with RL, it's shear stable so you won't have to worry about the spread. Plus, anything is more shear stable then M1 0w-40! ![[Smile]](images/icons/smile.gif){kind=icon}
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We used Delo 400 15w-40 in these turbo'd diesel trucks that were grossed out running very hard in these well over 100F temperatures...tell that to some people on this site (and many others!) though and they would make you think that the engines would have EXPLODED because of their use of DINO oil!
Anyways, in your situation, I'd personally recommend the 10w-40 as you'd be basically getting a straight-40 weight synthetic oil...even though I do feel 5w-40 can protect very, very well, like I said, I would pick the 10w-40 simply because you don't need the very low temperature properties of the 5w-40, and the 10w-40 will guarantee the protection you require while NOT shearing down, keeping wear rates low, and keeping the engine clean.![[Confused]](images/icons/confused.gif){kind=icon}
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