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#3218658 - 12/16/13 03:43 PM 2011 BMW M3 - BMW DCTF-1 / Pentosin FFL-4 - 51k
dparm Offline


Registered: 04/19/10
Posts: 13031
Loc: Chicago, IL
Code:
OIL             BMW DCTF-1 (Pentosin FFL-4)
MILES IN USE    51,108
MILES           51,108  
SAMPLE TAKEN    12/13/13
MAKEUP OIL      0

ALUMINUM        12
CHROMIUM        0
IRON            34
COPPER          5      
LEAD            0
TIN             0
MOLYBDENUM      0
NICKEL          0
MANGANESE       5
SILVER          0
TITANIUM        0
POTASSIUM       3
BORON           67
SILICON         11
SODIUM          5
CALCIUM         41
MAGNESIUM       2
PHOSPHORUS      263
ZINC            11
BARIUM          0
     
SUS VIS @ 210F 50.9
cSt @ 212F     7.55
FLASHPOINT F   405
FUEL            NA
ANTIFREEZE      0.0
WATER           0.0
INSOLUBLES      0.2
TAN             1.5




This is the factory-fill dual-clutch transmission fluid from my BMW M3. The fluid is BMW DCTF-1, which is Pentosin FFL-4 (basically a 75w85 GL-4). The transmission is a Getrag 7DCI600, which BMW labels as M-DCT/M-DKG and is the same unit as the Ferrari California. The fluid is classified as lifetime, but I don't trust that. Sump capacity is 7.8L. Worth noting that I usually drive the car in the more aggressive shift settings and am not shy about downshifting to get some engine braking. I've never used launch control.

Blackstone actually does have data from this fluid/vehicle and showed my wear to be much better than their averages! They specifically called out the copper and lead (from brass/bronze parts) as "amazingly low". They agreed that it's probably not a lifetime fluid, but said it could go to 70k or further.

I replaced it with Motul Multi DCTF, but due to the change process, we only got 4 of the 7.8L out though after seeing the analysis I have no worries about that. There is a transmission filter that was changed too.

So like my UOAs have shown, I definitely got a good one!
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2011 BMW M3 sedan ZCP

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#3218686 - 12/16/13 03:58 PM Re: 2011 BMW M3 - BMW DCTF-1 / Pentosin FFL-4 - 51k [Re: dparm]
martinq Offline


Registered: 07/22/05
Posts: 1031
Loc: ON, Canada
Any idea what kind of filtration is used on this tranny? Internal/external, magnets, etc?

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#3218696 - 12/16/13 04:04 PM Re: 2011 BMW M3 - BMW DCTF-1 / Pentosin FFL-4 - 51k [Re: martinq]
dparm Offline


Registered: 04/19/10
Posts: 13031
Loc: Chicago, IL
Originally Posted By: martinq
Any idea what kind of filtration is used on this tranny? Internal/external, magnets, etc?


Beyond the big cartridge filter below, unsure.

_________________________
2011 BMW M3 sedan ZCP

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#3218759 - 12/16/13 05:01 PM Re: 2011 BMW M3 - BMW DCTF-1 / Pentosin FFL-4 - 51k [Re: dparm]
martinq Offline


Registered: 07/22/05
Posts: 1031
Loc: ON, Canada
Ahhh NTZ, that's the good stuff! I believe they usually have a small magnet incorporated into the housing. Each application is different no doubt.

If it was mine I'd see about getting a magnet inline with the cooling loop. Something like Magnefine that can be opened & inspected.

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#3218805 - 12/16/13 05:47 PM Re: 2011 BMW M3 - BMW DCTF-1 / Pentosin FFL-4 - 51k [Re: dparm]
dparm Offline


Registered: 04/19/10
Posts: 13031
Loc: Chicago, IL
No standalone cooler for the DCT. The Europe-only GTS model has a cooler, but that's because it is a track-version of the car with a higher-output version of the motor and bigger clutches/faster shifts.
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2011 BMW M3 sedan ZCP

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#3218819 - 12/16/13 06:02 PM Re: 2011 BMW M3 - BMW DCTF-1 / Pentosin FFL-4 - 51k [Re: dparm]
martinq Offline


Registered: 07/22/05
Posts: 1031
Loc: ON, Canada
Is this a wet-clutch or dry? The GTR had big problems keeping the DCT fluid cooled.

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#3218869 - 12/16/13 07:01 PM Re: 2011 BMW M3 - BMW DCTF-1 / Pentosin FFL-4 - 51k [Re: dparm]
artificialist Offline


Registered: 09/23/07
Posts: 8187
Loc: Florida
I like reading DCTF reports because my car has such a transmission.
My Mitsubishi has a Getrag unit, but the filter is much different from yours. Mine looks like a generic cartridge engine oil filter.

I took a careful look at my filter and it did have lots of metallic sparkles, but the fluid didn't seem dirty. How did your old filter look?
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2010 Lancer Ralliart Sportback

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#3218878 - 12/16/13 07:09 PM Re: 2011 BMW M3 - BMW DCTF-1 / Pentosin FFL-4 - 51k [Re: martinq]
dparm Offline


Registered: 04/19/10
Posts: 13031
Loc: Chicago, IL
Originally Posted By: martinq
Is this a wet-clutch or dry? The GTR had big problems keeping the DCT fluid cooled.


It is a wet-clutch system.


Originally Posted By: artificialist
I took a careful look at my filter and it did have lots of metallic sparkles, but the fluid didn't seem dirty. How did your old filter look?


To be honest I didn't see the filter since a shop changed it out for me.
_________________________
2011 BMW M3 sedan ZCP

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#3218908 - 12/16/13 07:26 PM Re: 2011 BMW M3 - BMW DCTF-1 / Pentosin FFL-4 - 51k [Re: dparm]
martinq Offline


Registered: 07/22/05
Posts: 1031
Loc: ON, Canada
I'm amazed they are able to keep the fluid temps under control without a good cooling loop. The (2009) GTR can only last about 20mins on the track (summertime) before needing a couple cool-down laps.

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#3218936 - 12/16/13 07:51 PM Re: 2011 BMW M3 - BMW DCTF-1 / Pentosin FFL-4 - 51k [Re: martinq]
dparm Offline


Registered: 04/19/10
Posts: 13031
Loc: Chicago, IL
Originally Posted By: martinq
I'm amazed they are able to keep the fluid temps under control without a good cooling loop. The (2009) GTR can only last about 20mins on the track (summertime) before needing a couple cool-down laps.



Some guys do experience DCT overheating, but that's only after they've been on track for 20+ minutes and the ambient temps are over 100.

My car is also not putting out GT-R power/torque, and isn't 4WD.
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2011 BMW M3 sedan ZCP

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#3221047 - 12/18/13 08:42 PM Re: 2011 BMW M3 - BMW DCTF-1 / Pentosin FFL-4 - 51k [Re: dparm]
artificialist Offline


Registered: 09/23/07
Posts: 8187
Loc: Florida
The GT-R isn't the only car to have overheated fluid. The Evo X would sometimes experience it on track day. It also used a wet clutch system, but I don't know if that is the cause.

Evo X racers sucessfully prevented this by installing larger transmissions coolers, is installing a larger cooler on a GT-R an effective solution? Can it even be done?
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2010 Lancer Ralliart Sportback

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#3221187 - 12/19/13 12:14 AM Re: 2011 BMW M3 - BMW DCTF-1 / Pentosin FFL-4 - 51k [Re: artificialist]
martinq Offline


Registered: 07/22/05
Posts: 1031
Loc: ON, Canada
Originally Posted By: artificialist
The GT-R isn't the only car to have overheated fluid. The Evo X would sometimes experience it on track day. It also used a wet clutch system, but I don't know if that is the cause.

Evo X racers sucessfully prevented this by installing larger transmissions coolers, is installing a larger cooler on a GT-R an effective solution? Can it even be done?

Yes I remember an EvoX at the track going for cool-downs due to tranny temps. A proper air-oil cooler setup is probably the best way to address this. There's plenty of options for the GTR but they're pricey just like anything else GTR related.

http://www.amsperformance.com/cart/hks-nissan-gt-r-r35-dct-dual-clutch-transmission-cooler-kit.html

http://sheptrans.com/products/gtr-r35/billet-alloy-transmission-pan-sump/

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