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      07-13-2011, 02:47 PM   #1
wwjd15
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OEM tranny and lsd fluid reports after track days

Just wanna share some reports from Blackstone Labs. I think we can use the fluid a little longer next time.

Miles: 5k
4 track days in total, about 8 hours track driving.
All tranny and LSD fluid are OEM.
Tranny: DCT

Tracks:
Infineon 1 hour, 60-70F
Buttonwillow, 3 hours, 80-90F
LVMS 4 hours, 90F

The reports look good to me. I think I will keep using the OEM fluid for now.

I also have a report for my Motul 300V 10w40, it was good as well, but I couldn't find the actual report.


EDIT: I can't upload the files, so I just copy them here:

LSD:
Wear looks fine in this initial sample out of your BMW's differential. Universal averages show
typical wear levels for this type of differential after about 30,000 miles on the oil. We don't know how long
you ran this oil but wear is still in the average range, so we'd guess it wasn't much longer than that. Silicon
is on the high side, and this is probably harmless sealer material. If you suspect it's dirt, then check into
where it might be coming from, but we suspect it's not a problem. The viscosity is okay for gear oil. Looks like a nice differential.

Tranny:
We aren't sure which variation of the E92 BMW you own, making it tough to guess what type of
transmission this is. The oil looks like ATF, so we categorized this sample as being from a BMW automatic
transmission. If that is incorrect, let us know and we will be happy to change the report for you. At any rate,
wear metals look very good for the transmission in your new 3-series. No moisture or insolubles were
present and the viscosity was in the middle of the acceptable range for ATF. This fill of transmission fluid
appears to have a lot of life left in it.
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      07-13-2011, 02:53 PM   #2
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Did you have your tranny fluid changed? If so, where did you get the fluid? Did you have the dealer do it?

Thanks.
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      07-13-2011, 03:06 PM   #3
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It was my 1k mile service so dealer took care of everything. But normally I would buy fluid from local dealer or amazon and have my own tech to do the job.
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      07-13-2011, 05:35 PM   #4
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isnt' DCT lifetime fluid...?
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      07-13-2011, 05:39 PM   #5
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Quote:
Originally Posted by persian54 View Post
isnt' DCT lifetime fluid...?
How would you believe it...
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      07-13-2011, 06:06 PM   #6
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Quote:
Originally Posted by wwjd15 View Post
How would you believe it...
well I have a lease...... so as long as it lasts me 30k miles I'm good
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      07-13-2011, 07:50 PM   #7
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Am very interested in these things as track the car pretty aggressively and want to keep this car for awhile. So you actually changed the DCT tranny fluid? Would love the part number if possible for the fluid and any feelings on the necessity of doing this. Have over 20k on the odometer on a 1 year old car with going to be over 25 track days by fall... Thinking about doing it after the season... Good to hear these things at that they're possible... For all those who plan on keeping the car, like me
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      07-23-2011, 07:40 AM   #8
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Quote:
Originally Posted by klammer View Post
Would love the part number if possible for the fluid and any feelings on the necessity of doing this. Have over 20k on the odometer on a 1 year old car with going to be over 25 track days by fall... Thinking about doing it after the season... Good to hear these things at that they're possible... For all those who plan on keeping the car, like me
1. To me, 'lifetime fluid' means 'on average it will be barely adequate by the time the DCT leaks or requires rebuilding'. I would certainly have more peace of mind changing the fluid periodically. That is, unless the fluid itself has a break-in period to reach max effectiveness.
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      07-23-2011, 07:45 AM   #9
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Quote:
Originally Posted by wwjd15 View Post
Miles: 5k
4 track days in total, about 8 hours track driving.
All tranny and LSD fluid are OEM.
Tranny: DCT

-snip-

LSD:
Wear looks fine in this initial sample out of your BMW's differential. Universal averages show
typical wear levels for this type of differential after about 30,000 miles on the oil. We don't know how long
you ran this oil but wear is still in the average range, so we'd guess it wasn't much longer than that. Silicon
is on the high side, and this is probably harmless sealer material. If you suspect it's dirt, then check into
where it might be coming from, but we suspect it's not a problem. The viscosity is okay for gear oil. Looks like a nice differential....
Whoa just catching this part. You have 5,000 miles but 30,000 miles of wear on the diff? Is that right?
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      07-25-2011, 12:47 AM   #10
wwjd15
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Quote:
Originally Posted by llis View Post
Whoa just catching this part. You have 5,000 miles but 30,000 miles of wear on the diff? Is that right?
Yes. It means I need to change the diff fluid a bit more often, like engine oil
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