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Originally Posted by Wayne's World
I will be going with the Valvoline DEX VI. I've ordered the original BMW filter and Transfer Case Fluid (xDrive, '06) from ECS Tuning.
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Here are my threads on the diffs and transfer case:
http://www.xoutpost.com/x5-e53-forum/...que-specs.html
http://www.xoutpost.com/x5-e53-forum/...-diff-oil.html