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Discussion Starter #1

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Discussion Starter #3
Could this be why there is black soot on my muffler? Just got a 2016 MKC and noticed it.
Soot is a byproduct of direct injection and is very common.. Use Barkeepers Friend stainless cleaner to take it off. This TSB issue is white smoke on startup after a previous long idle (over 10 minutes)
 

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Discussion Starter #5
So it is normal to have black on the muffler? How long does it stay clean once you apply the cleaner?

If you don't drive it forever! In reality you may clean it every 2 or 3 months.
 
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