E46Fanatics - View Single Post - Changing diff fluid. Oem or not?
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Old 05-29-2012, 08:38 AM   #4
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Join Date: Apr 2004
Location: Edgewater, NJ
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My Ride: E92 soon?
Originally Posted by steven747 View Post
don't go oem fluid its pointless and has no benefit ..
Please don't make blanket statements. As stated, non-M open diffs and M LSD are different and need different fluid. The FM Booster was added to reduce noise/diff whine. Many M3 owners switched to Redline or RP and noticed add'l whine after few thousand miles, fix = OEM fluid with FM Booster.

OP, your car will work fine with non-OEM fluid but I suggest you use it in case you find non-OEM fluids making un-wanted noise. Changing it once with more $ fluid is still cheaper than changing it twice with non-OEM and then OEM.
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