Allegedly biodiesel will clean all of the trash out of your tank/lines and dump it into the filters if you have been running straight diesel.
Tell me about it. The first time I came across the stuff was in Texas and I think it was posted on the pump "up to 20%" 3 sets of filters in less than 100 miles on an N14 Cummins and the first 2 plugged up so bad it wouldn't even idle. After the 3rd set it was good, never an issue again.
Good solvent that soybean oil...
Kevin