I looked into this a slight bit in the past and heard modifications might be needed in order to run biodiesel, I think this is something that should require some good research before getting into.
This is too bad, really, as a system designed to make the engine more green actually has the opposite effect, at least for those of us who would choose to burn B100 if we could.
Most modern*diesels can't use more than b20. It's beacuase of how they handle the regen process. Engines that can use b100 have an enjector built into the exhaust system. Manufacturers now use the computer to inject fule into the cylinders during the exhaust stroke. This saves money on parts. The issue is biodiesel is more viscous and not all the biodiesel will atomize. So some fuel will seep past the rings and contaminate the oil.*
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