The new (2009-current) BMW 335d sells in the U.S. with a DPF to reduce emissions, but which prevents the use of biodiesel. I've read about people removing the DPF and re-mapping their ECU to get better performance out of the engine. I'm wondering if doing this would allow the use of biodiesel without mechanical problems.
I am not asking about the implications on factory warranty.
I am not asking why using biodiesel is a bad idea (or a good one).