Comments by "Citizen" (@rjb6327) on "Direct Injection Carbon Build Up! (Explained) Intake Valve Chemical Cleaning Vs Walnut Blasting!" video.

  1.  @TXCherokee  2001 Mazda Tribute, bought new..
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  2. I have 270K+ on my engine and have never run a cleaner through it. Car runs great.
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