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M2 Technical Topics > Mechanical Maintenance: Break-in | Oil & Fluids | Servicing | TSB | Recalls > M2 LCI: Anyone done a 6MT Oil Change?

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      10-10-2018, 12:38 AM   #1
blbainb
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M2 LCI: Anyone done a 6MT Oil Change?

I've seen recommendations to change the manual transmission oil at 1200 to 2000 miles to extend life (not from BMW, of course). I found the spec of MTF LT-5 for the oil but I can't find a fill capacity. Does anyone know how much oil is needed? Thanks.
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      10-10-2018, 11:35 AM   #2
chiefsubjugator
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Where did you see those recommendations? I was debating changing my manual trans. fluid too but I didn't see any data supporting a change one way or the other - Blackstone didn't have enough data either to tell me whether it was necessary.

At any rate, the filling capacity is 1.6 Liters. Note that the instructions say to fill until overflowing, which in my experience is typical for a manual transmission fluid change:

https://www.newtis.info/tisv2/a/en/f...box/1VnXyO2l8u
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      10-11-2018, 03:08 PM   #3
M Fifty
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I thought the fluid got changed as part of the RIS?
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      10-12-2018, 12:53 AM   #4
chiefsubjugator
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Quote:
Originally Posted by M Fifty View Post
I thought the fluid got changed as part of the RIS?
Nope, transmission fluid is not changed as part of the run in service.
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      10-14-2018, 12:32 PM   #5
M Fifty
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Well, How long are you planning to keep this car for? If you're going to replace it before the end of the Warranty period, you may as well leave it alone.

Back in the days of BMW not filling the transmission with LTF-1 or LTF-2 and changing the customer for oil changes, they used to say do it every 2 years.

For reference, I replaced the LTF-1 in the gearbox of my e46 330ci at 150k miles. It was as black as soot and had the consistency of milk. Noting that the stuff going in looked like apple juice, the question with the LTF is more what counts as the "Life" that these gearboxes are "Filled For"?

HTH
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      10-19-2018, 07:49 AM   #6
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I changed my 6MT at the running in service. Cheap insurance. Capacity is around 1L I believe, but I'd check an actual service manual to determine exactly. Or do the old fashioned way and use your pinky.
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      10-19-2018, 11:07 PM   #7
blbainb
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The recommendation for an early MT oil change is from Mike Miller of BMW CCA fame. After that it's every 30k miles. Just like the engine, a low mileage change can remove any manufacturing debris or any odd bits that are generated in the first few miles of use. Makes sense to me, anyway.

Sure, if you'll only keep the car for a short time it won't make any difference, assuming the right amount of oil was put in there to start with. Probably a good bet that everything's fine but it's a simple service and provides peace of mind.
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      07-07-2022, 09:58 AM   #8
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just curious I track the car about 15-20 days a year. Does the transmission fluid need to change on the MT sooner? Shifts feel fine always rev match on shift and never engine brake
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      07-07-2022, 06:23 PM   #9
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I changed mine at 1200 miles and will do it again at 30k if I have the car still.

The factory fluid by Pentosin, buy 2 of them, takes about 1.6 liters:

https://www.fcpeuro.com/products/bmw...ntosin-1052107
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