There nothing wrong with running Bio Diesel, its not going to hurt a thing.
I have a 1982 Kubota tractor that I bought used in 1982 that had 700 hrs. on it, This tractor has every type of diesel ran thru it, #2, #1, Red off road diesel. I have ran B20 and am now running Propel Fuels HPR in it with zero issues. I have had no seal or hose leaks, tractor now has 1350 hrs. on it. My son had a 2003 6.0 diesel and he used B20 and HPR with zero issues. Does anybody really have issues with Bio that they can actually prove was caused by Bio other that plugged fuel filters due to the cleaning up of your system.