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Hey all! I have a new to me 2016 platinum f-150 ecoboost 4x4 with 55xxx miles on it. I have recently noticed that it smokes a bit at idle after driving it for an extended period (say 20 minutes or so in the interstate) then coming into stop and go traffic it just puffs out smoke, has anyone experienced this??

I see lots of threads regarding smoke on start up or hard acceleration but mine is fine in both of those scenarios just after being driven and coming to an idle .. any help is much appreciated.

Of course The ford dealership “can’t duplicate the results” so their approach is “leave it with us for 12 days with no loaner so we can tear it apart to see what’s wrong” ... I really don’t think it is a major issue as performance hasn’t changed but I’m new to these engines
 
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