OK my results are in.

Last week I put 2 oz into 20 gal and went from about 16 .5 MPG to 15.1 MPG. However I did find that I had the AC on for the first 145 miles. Since my blower doesent work I did not realize this. I repeated the test with 6 oz into 20 galons and made sure the AC was off. This time I got 15.94. Not the astonishing results depicted in the graphs. Basicly as others have posted the stuff is crap. According to the graphs in the articles 6 oz ionto 20 gallons gives about the maximum milage gain.

John Roncallo