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sooty

  1. 2010-13 Mazdaspeed 3 Engine and Performance
    Hi guys, I have a 2010 Mazdaspeed3. Is it normal that above the tailpipes on both sides quickly get sooty deposits. I have had the car from new and I believe it has always done this. The soot is dry (not oily) and washes off pretty easily. I live in California so this isn't the product of long...
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