I don't have much experience or knowledge of Bio-fuels but i can offer this: I did go to college with someone that produced his own BioDiesel fuel. From what he told me it seemed to be working for him. The only problem with it is buying all the equipment to store and mix all the components of the fuel. He was using used cooking oil from local businesses. Getting the used oil from the businesses would also be a concern. I think that is only ONE of many ways to have an impact on emissions and fuel economy. There are many ways to do this.........whether it be Bio-Diesel fuels or Hybrid technology. In each case, there are factors and personal opinions that will come into play to help each person make the decision which is a BETTER solution than the other.