Ahsai

No, I meant this. Check out how much milk they can hold.

http://www.996revolution.com/m96-engines.html

dallison28

I remember cleaning out the oil that was laying in there, but i didn't remove them and dump them out.

Howaboutthat

These cars will smoke at various times. For example, if I start the car after it has cooled down in the evening just to move it into the garage (so, running it only for a few seconds), then start it the morning -- plenty of smoke. Same effect, both before and after a comprehensive rebuild, replacement of AOS, and so forth. I wonder if the boxer design lends itself to this?

Schnell Gelb

Yes. That tendency has been confirmed as a harmless quirk of the M96 design.
The OP's situation seems different - much more smoke and associated with high revs+incline.That indicates a less benign characteristic of the M96. Specifically , the engine will whip up (literally) a lot of oil foam if a high detergent engine oil is mistakenly used. Mobil 1 is such an oil. If you read up on this subject it has been discussed many times by experts(not me !)
The proof and solution are simple. Change to an approved low detergent oil and observe the recommended change frequency(3k miles). It doesn't require much imagination to picture what happens as the crankcase fills with oil foam.The AOS will ingest a lot of it and when the foam settles throughout the intake system.......It will all be consumed when the engine restarts.
This diagnosis of the OP's problem may be wrong but it is easy to test wth an oil change.
Remember the current formulation of Mobil 1 is quite different to the product that was the basis for the Porsche "Factory Fill" recommendation over a decade ago.
http://lnengineering.com/resources/2...s-racing-oils/
"...... the M96 engine and also has superior foaming and aeration control, leading to improved oil pressure on the track and less strain on the AOS."

5CHN3LL

Interesting that there still does not seem to be an alternative to the AOS; reading the AOS information on the site Ahsai linked to helps to better understand why.

Woodman71

I wish the AOS wasn't a weakness on these engines, but it is nice of them to give us somewhat of a warning/indication they are on the fritz, what with the suctioning on the oil filler cap.

dallison28

Isn't the recommended change frequency 15k or one year?

What lower detergent oil would be good? I ask this hoping it doesn't spark the usual debate. I just want a good recommendation so i can change the oil when it's due.

AWDGuy

I can vouch for this also. Move my car a few feet and move it again later, it will smoke. even with the rebuild. I notice it when playign musical cars moving cars around in the driveway..

DBJoe996

Isn't the recommended change frequency 15k or one year?

Not if you like your car and want to maintain your engine properly. 15K is way too long. <5K is good and 3K is much better. I change my oil twice a year regardless of mileage.

Howaboutthat

I try to change at 5,000 miles and use Motul X-cess 8100 (5W-40). These cars do seem hard on oil, so I change it out more frequently than in our other German vehicles. Not sure if the Motul is low detergent, but both of our indy specialists use it as a top-line, non-racing oil.

Schnell Gelb

All the information is in the link given:

http://lnengineering.com/resources/c...ts-and-fluids/

Frequency :
Of course there are other sources of advice but examine their credentials carefully before you accept notions like 15k oil changes on the M96. And then consider the cost of an engine rebuild if the advice was wrong. The cost of an oil change is trivial by comparison.
Oil type:
Perhaps it doesn't have to be JG DT 40.But it probably needs to be very similar. Let us know if you find an oil claimed to be very similar to JGDT40. But we need specific tribology specs. to believe it. It would be great to have a technically validated alternative. There is is one that is close but I'll leave that for others to discuss in a separate thread.
The OP could be a useful guinea pig by changing to JGDT40 and then let us know if his specific situation of excessive smoking improves ?

Macster

None. High detergent oils are the norm and have been for a while. The only time I used non-detergent oil was in my lawnmower engines.

In car engines, run a low/non-detergent oil and get ready for the sludge.

The smoking isn't from the high detergent oil. These engines are intended to use high detergent oil and in recognition of that Porsche fitted not one but two de-foaming pots to help remove air from the oil.

It is unfortunate that the AOS isn't as good at removing oil vapor from the crankcase fumes as the de-foaming pots are at removing air from the oil.

The smoking might be due to a problem but it not from running a high detergent oil. A good number of owners run the same oil -- it is factory fill -- and don't report smoking at hardly any time.

The smoking if not normal will be found to be due to something else, not the use of high detergent oil.

Schnell Gelb

Nobody is advocating 'non-detergent oil'.Nobody.
Some detergent is obviously beneficial.
The M96's foaming characteristic is a problem that high detergent oil will exacerbate.
Changing to an approved lower detergent oil is a simple test to prove if excessive detergent is a cause in this case.It can do no harm.

dallison28

I never go 15k, it's more like 5k. I'll have to look at other oils to see if it will be any different.