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      12-05-2012, 05:22 PM   #2
Blackhawk36
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Drives: 2007 335i 6MT No iDrive
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Flourescent dye added to the oil then a black light. You get the dye at an auto parts store and a black light at a Lowes or Home Depot. Put the dye in. Drive around for a few days then find the leak with the light. It will fluoresce pretty well.