Probably good that they plan to roll it out in 3-4 years. EPA testing standards for diesels are currently in flux. Would suck to bring a diesel out now for example, only to have emission standards changed and have to reeingineer the Diesel engine to comply. Better to see where the EPA standards settle and then bring out a diesel that complies for the duration of its model life.Was hoping the diesel would be available at launch with the first model year. Any idea why they're waiting until 2020 to bring it considering this diesel engine is already being used in the U.S.?