I have been trying to find a steady source of bio diesel I'm in Romulus near metro airport. the closest place is wacker oil on M-52 in Manchester. Sells it year round and it is winterized and everything. its a nice drive and all but I wish there was some place closer. there used to be this place on will carleton that used to sell B-20 but they havent sold it in a while. I try to run bio diesel when ever possible. lubricity and all... so where do you get yours?