Funny to hear all this about biodiesel. I ran b100 in my TDI (with a PD, not common rail, engine) and I never had issues with too much oil in the crankcase. I ran it for every season but winter when I switched to b20. Over 5 years and nearly 80k miles worth. Are the CRD and PD engines that different? I'd be interested to hear what TDI guys are doing since I believe they are now common rail diesels, correct?