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Recommend contacting Blackstone Labs for an oil sample collection kit. Commercial and Military aviation have used oil analysis for decades to monitor engine wear. Blackstone can also recommend oil change intervals based on your oil analysis. FWIW, I have 265,000 miles on my 2008 N52. I’ve done 25 track days during the past two years.
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 2008 E91, ARC-8, 255/40/17 NT01, ER sport cooler, TCK camber plates, coil-overs 400# front 700# rear, Koni SA shocks. M3 Subframe bushings, front + rear control arms, tension struts, strut brace. Quaife, Carbotech, Schroth. |