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      11-08-2012, 09:28 PM   #3
nicknaz
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Drives: F80 M3
Join Date: May 2008
Location: SoCal

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I haven't checked the Z4 28i but my last browse on realoem.com for the F30 328 suggested no separate oil cooler.

My thought is to see how hot the car gets during your usual driving to assess whether it is worth it.

I've seen limp mode threads for the 328i so might not be worth it depending on how hard you drive.