Did everything right. Poured the stuff down the Vac line at the Master Cylinder with the car running. Then turned the car off and waited 7-8 min. I fired it back up and drove it hard for about 15 min or so. I did not see any smoke at all out the exhaust. The exhaust smelled a little different is all. Did I do something wrong? Or is my engine super clean already for some reason lol. Maybe I didn't use enough... i dunno. Thought I dumped about 1/3 can in there.