Using Biodiesel

      The National Biodiesel Board offers the following guidelines for biodiesel usage.
      • Ensure your supplier warrants that his fuel meets the ASTM specification for pure biodiesel before blending with petrodiesel.
      • Check fuel filters frequently upon initial biodiesel use. The fuel will dissolve sediment in fuel lines and tanks, which may require more frequent filter changes until the fuel system is cleaned of deposits.
      • Watch engine components for problems. Pure biodiesel will soften and degrade certain elastomers and natural rubber compounds over time. Blends with a high percent of biodiesel can deteriorate fuel hoses and fuel pump seals made of these materials. Most engines designed for low-sulfur diesel fuel should have components that are compatible with biodiesel, but natural or butyl rubber components should not be used with high percentage blends.
      • Beware of biodiesel's cold weather properties and take the same steps you would with No. 2 diesel when used in cold weather. Use pour point depressants, blend with No. 1 diesel or use engine or fuel heaters.
      • Clean up fuel spills on painted surfaces. The fuel is a solvent and can dissolve certain types of paint if not wiped up promptly.
      • Store biodiesel-soaked rags carefully to avoid possible spontaneous combustion.
      • Use stored biodiesel within six months. Like all fuels, biodiesel has a shelf life. For best results, use within six months of purchase.