I tryed out a can of seafoam on my 91 N/A today. After all the smoke cleared and everything it seems like its running a lil better. Maybe its just me but it sounds more quiet and its pick up feels better. The way I used it was 1/3 oil, 1/3 gas, 1/3 vaccum line into intake. Hers a few vids of how bad it made my car smoke, the last shows my exhaust leak and how bad it is.
[edit]: They were taken with a cell phone so sorry about quality.
