EPA demands DEF failure data from diesel makers. Investigation could force recalls and software fixes for engines already on U.S. roads. 30-day deadline set.
You can get big bucks to fix Cummins' dirty diesel, but there are a few drawbacks ...
Both Cummins and Ford offer 6.7-liter diesel engines. They share a few similarities, but those don't go much further than their displacements.
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