The latest info. I have is that biodiesel (B20) is more expensive than regular diesel. Here in California it is about $2. 59 per gallon at the pump. B100, which is pure biodiesel, can be burned with modifications, or it can be used to blend with regular diesel (20%). B100 is around $4. 27 per gallon, but you should shop around as you can buy from several producers around the country. I know this sounds like alot in comparison to regular diesel, but there may be a price reduction of between $. 50 cents to $1. 00 per gallon if the provisions in the Federal Energy Bill are passed. This will cut taxes on biodiesel because it is an alternative fuel. It would be a good idea for those interested to contact their Congress person and voice their support for this bill. Also, our respective state Senators should be contacted as well. In California there is a similar bill. Make yourselves heard!