Biodiesel is one of the available forms of fuel. In the United States, there are six to seven producers who produce this substance. When it comes to the rate in 2011, it is around $1.65 and $2.25 for one gallon. However, this price is without the application of taxes. After the application of taxes, the prices increase by $0.5. If the combination is changed and the percentage of diesel is four times more than biodiesel, the charges would increase by eighteen percent.