used a vaccum line, about1/3 the can and poured the other 2/3 into 1/4 tankof gas

I used it in the 97 and got hardly any smoke from it. Used 1/3 in the oil right before a change, 1/3 into the vacuum hose and 1/3 into the gas tank

Guess I keep the carbon cleaned out of my cars.

Same here on my 92. Almost no somke at all. I guess it all that time that my car spends on the highway. I use just regular ,although my car seems slight happy with midgrade but not enought warrent use it all the time.