Due to the variety of standards that exist in the diesel engine industry, John Deere Power Systems has officially clarified its position on the use of biodiesel in its diesel engines.
While 5 percent blends are preferred, biodiesel concentrations up to a 20 percent blend in petroleum diesel fuel can be used in John Deere engines through Tier 3/Stage III A models, including all non-emissions-certified engines. Biodiesel blends up to B20 can be used only if the biodiesel meets ASTM D6751 (U.S.), EN 14214 (EU) or equivalent specification.
Biodiesel users are strongly encouraged to purchase biodiesel blends from a BQ-9000 Certified Marketer and to source from a BQ-9000 Accredited Producer, as certified by the National Biodiesel Board. Certified Marketers and Accredited Producers can be found at www.bq-9000.org.