Manufacturer Endorsements

According to the National Renewable Energy Laboratory, “manufacturers warrant their products against defects in materials and workmanship. In general, use of a particular fuel should have no effect on the materials and workmanship warranty.” Use of biodiesel should not “void the warranty,” as this may be prohibited by the Magnuson-Moss Warranty Act. Manufacturers are concerned that extensive use of biodiesel will result in increased numbers of warranty claims for what are actually problems caused by the fuel. Engine and vehicle manufacturers are generally comfortable with blends up to 5%.

Many engine original equipment manufacturers (OEMs) are acknowledging biodiesel use by stating their observations about harmful effects, or lack of effects, with various blends in their equipment. While manufacturers do not warrant the fuel itself, many have position statements and recommendations on biodiesel. Click to read excerpts from some manufacturer's recent position statements on biodiesel.