Will using biodiesel damage my engine or void the manufactures warranty?
No, but there are some things that you need to know. Manufacturer warranties only cover defects in material and workmanship. These warranties do not cover engine problems related to fuel of any kind (biodiesel or petroleum diesel). Tests and demonstrations, however, have shown that biodiesel is no different from petroleum diesel in terms of engine performance and wear. Some manufactures such as Volkswagen have made very positive statements about biodiesel. John Deere and DaimlerChrysler have gone as far as to fill their diesel vehicles with biodiesel blends on the production line.
