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      05-21-2012, 07:03 PM   #3
GaryS
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Drives: 2009 135i 6MT
Join Date: Feb 2010
Location: Maryland

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2009 135i  [6.50]
RBF 600 and SRF are both fine for street or track. I don't think you have winter there, but if you do, you should change RBF 600 to something else like Motul 5.1 for the cold wet months. SRF is okay in winter.
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