Assuming your car is 100% stock there is an issue with the stock crankcase oil separator which causes this exact issue you are experiencing.
A TSB was issued on this.
TSB 15-0192 - 2.3L GASOLINE TURBOCHARGED DIRECT INJECTION (GTDI) - EXCESSIVE EXHAUST SMOKE AFTER EXTENDED IDLE
I would attach the TSB for you to read, but this lame forum only allows 20kb attachments!?
Here is a link to the TSB online: http://mustang6g.com/forums/attachment.php?attachmentid=56878&d=1452956198
U.M.
A TSB was issued on this.
TSB 15-0192 - 2.3L GASOLINE TURBOCHARGED DIRECT INJECTION (GTDI) - EXCESSIVE EXHAUST SMOKE AFTER EXTENDED IDLE
I would attach the TSB for you to read, but this lame forum only allows 20kb attachments!?
Here is a link to the TSB online: http://mustang6g.com/forums/attachment.php?attachmentid=56878&d=1452956198
U.M.