[Biostockman]

I installed SSTT a week ago... I'm meticulous with my car and it's always clean, within the last couple of weeks the inside of my tailpipes went from being clean to as dark as coal. Granted I've always had some carbon build up at the tailpipe exits but I don't think I've ever had this much.. Do any of you you believe that there is some sort of connection to the SSTT and increased carbon output? Is this something I should even be worrying about? BTW, not that it matters a whole lot but I do only run Shell's V-Power.