as i said in another thread, i finally found a 300D worth keeping, i knew there was a local distributor here in San Diego of Bio Diesel, so i went on an empty tank and filled up. it was funny when i went therre they called it bio willie bio diesel fuel http://www.wnbiodiesel.com/index.html thought you all might find this interesting, seems it is currently only available in California,Texas, South Carolina and Georgia. car seems to run well., no problems as of yet.