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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, Nov-04-2010, 03:35:21 PM   #11
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Thanks for the support everyone!

OP you can find exactly what you need below...

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Old Fri, Nov-05-2010, 02:44:04 PM   #12
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Why would you even consider changing from OEM, what magic are you looking for?
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Old Fri, Nov-05-2010, 03:53:00 PM   #13
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Why would you even consider changing from OEM, what magic are you looking for?
I think that the main argument is cost savings. It is significant. However, I think that using non-OEM might cause unnecessary wear on the parts. Unless there are any downsides to using OEM, I don't think that it's worth the risk. Just my .
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Old Fri, Nov-05-2010, 06:52:02 PM   #14
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The delta in cost between OEM on aftermarket could be high as $80 dollars. Seems most people will change it every 50k or so. Judging that most will put 15k of miles per year, $80 premium over 3-4 years is cheap.
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Old Fri, Nov-05-2010, 06:56:02 PM   #15
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I change mine out about once per year, depending on how many track events I do. Heat kills diff fluid and the diff gets plenty hot at the track.

Mobil 1 gear oil seems to do just fine.

If you buy the new formulation BMW fluid, realize that it has more friction modifiers in it (more slip allowed). It is meant for those w/noisy diffs.

YMMV
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Old Fri, Nov-05-2010, 06:57:47 PM   #16
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I've got the nasty grind coming from my diff. just ordered the new updated bmw fluid and hopefully it eliminates the noise.
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Old Fri, Nov-05-2010, 06:59:12 PM   #17
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I've got the nasty grind coming from my diff. just ordered the new updated bmw fluid and hopefully it eliminates the noise.
It should. How long was your fluid in there and usage type (general commuting, etc.)?
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Discussing differential fluid question. in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)