I also live in Seal Beach and am interested in Bio-D. Someone told me that the closest place is in Santa Barbara but im not sure the name of the place. I also found this info on BioDiesel.org about Pinnacle Petroleum, Inc. Located on 1500 East Pacific Coast Hwy, Ste. F Seal Beach, CA 90740. I have never seen this place but I imagine it is near Inflight Surf Shop because of the address. BTW why do you only want to run B20? I would think with our weather you could run a more potent blend.