I probably have over 10 gallons of gas/Seafoam mix still in car. I noticed it is still blowing a little white smoke at WOT, I am assuming this is carbon build up.
The seafoam will cause the engine to smoke just by itself. I used some in my used civic when I went through it. You gt some in the intake, let it sit, then start it up and add a little more while someone bumps the throttle. Your neighbors will hate you though, it smokes a lot when you clean the intake