1. Understand your OEMs’ warranty position on biodiesel and communicate with them your desire to use biodiesel blends in your diesel vehicles. For more information on OEM support for biodiesel, visit www.biodiesel.org/using-biodiesel/oem-information.

2. Ensure the biodiesel meets the ASTM specification for pure biodiesel (ASTM D 6751) before blending with petro diesel. Write these ASTM specifications into your fuel supplier’s bid specs.