I have been trying to learn more about biodiesel and veggie oil. I have read that in order to run on unprocessed veggie oil, a separate heated tank and filter system is needed. What would happen if you poured some veggie oil straight into the fuel tank? Just filter clogging or anything more serious? Another question about veggie oil- since a separate tank and I assume a more porous filter is needed, does the veggie oil filter allow particles through that could clog anything? If say a batch of fryer oil was attained, how is it pre cleaned before use?