How are engine manufacturers warranties impacted by biodiesel use?
Using biodiesel fuel only impacts the warranty as it relates to fuel related problems directly attributed to biodiesel. According to the U.S. Department of Energy, “Federal law prohibits, the voiding of a warranty just because biodiesel was used it has to be the cause of the failure.” Most OEM dealers and customer service departments currently tell their customers that 5% biodiesel blends (B5) are acceptable, with the requirement that the pure biodiesel used in the fuel blend adheres to ASTM D6751. Some OEMs’ warranties now cover the use of biodiesel blends up to B20 for certain engine models. For an updated list of OEMs and their position on warranty coverage for biodiesel usage, visit the National Biodiesel website at: http://nbb.org/resources/fuelfactsheets/standards_and_warranties.shtm.
