Any negatives to using Seafoam?
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I bought a can a few weeks ago and thought I'd give it a try. At 148k, I figure I have some carbon buildup. I've searched the archives and read the good reviews. Just wondering if anyone has heard of anything negative. I know it will throw misfire codes. Should I wait until just before the next scheduled spark plug change? Just want to make sure I won't screw anything up.