I recently seafoam my car.
I added seafoam to the gas tank/oil/vacuum..
this is my second time doing this and the first time I did it was when I first got the car, tons of smoke came out but this time I got no smoke at all..
now my RPM takes a really long time to drop when I cruise in a gear and if i step on the clutch it will drop down to idle..
here is a video to show what i am talking about.
in the video I only went up to 4th gear and just let it cruise in gear and you can see it takes a while to drop and stays in 3k and when it finally drops its because I stepped on the clutch and left it in gear..