Originally Posted by Jeremy5848

Some diesel sellers are adding small amounts of biodiesel (2% - 5%) in the belief (and it may be true) that it makes up (in lubricity) what ULSD lacks. Given that the biodiesel industry is barely out of diapers, it is possible that a careless fuel seller could get a bad batch and contaminate his tanks.

I buy almost all my fuel from "Rotten Robbie," a local chain here in NorCal. They sell a biodiesel blend, B20, which I have used for a year with no problems. Our diesels get better fuel economy on B20 than on B100 and 20% biodiesel is enough to get rid of the diesel "stink" (my wife's word, YMMV). Then again, I know the source of the biodiesel that they use in the blend, so I have no worries.

Jeremy