Commercial biodiesel is not made in plastic tanks in a garage
All engines are designed and manufactured for a fuel that has certain characteristics. The industry organization in the U.S. that defines the consensus on fuels is the American Society for Testing and Materials (ASTM). To be called biodiesel, the fuel must meet ASTM and industry standards to ensure consistent and reliable operation in your engine.
In December of 2001, ASTM approved the full standard for biodiesel, with the designation of D-6751. The approval of this biodiesel standard, and the technical reviews necessary to secure its approval, has provided both the engine community and customers with the information needed to assure trouble-free operation with biodiesel blends.