first off i am no stranger to the seafoam i have been using it for the last 2yrs or so with excellent results but today's seafoam session was different, i did what i usually do and poured 6ounces down the PCV line turned off the truck waited five minutes and cranked it back on at first it was the usual white greyish smoke coming out the tailpipe then i noticed that black smoke was coming out the exhaust too. has this happened to any of y'all before? it also threw out some black stuff out on the driveway.
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