I have no experience with the stuff, although I know it has been around for years. I just want to ask about your engine. Do you feel the smoke is from high mileage, or possibly this car has sat for a while? Also, is the smoke black, or white-ish? Assuming black, it would be oil or a rich running carb.. Do you have to add oil often? My old 74 Dart had to have a quart every 500 miles or so, but I never noticed any smoke. It did have over 90K on the engine though.
Mike