Apparently, it is coming...

Mazda Skyactiv-D 2.2 Clean Diesel Heads to U.S. in Early 2013

Mazda Confirms Diesel-Powered Model for the States, Sales Start in Early 2013 - Carscoop

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1982 240D auto 152k
1984 380SL 113k
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1985 300DT
1984 190D 5sp Euro