Quote:
Originally Posted by winbasic
What year is your car? I do regular Blackstone testing but I'm not sure of it's value given the car is 2012 so I understand they use a different bearing which has less trace metals in it which can be picked up by the test.
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2008 E92 build date 6/08. I went from 4 ppm lead to 15 in January and then up to 30ppm in October. That's when i decided to change the bearings