John Deere to add DEF to engines for Final Tier 4 standards

John Deere made a highly anticipated announcement at Commodity Classic 2012 that it will add diesel exhaust fluid (DEF) to its engines in order to meet Final Tier 4 emissions standards. Jarrod McGinnis, division marketing manager for John Deere, explains what this means for the future of John Deere engines. For more information, read the story explaining the announcement here.

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