George I myself is a ways off from using anything until I get mine where I can say I've got all I can get out of mine and then that may be to much for me and my hotrod. But in show off you will see my brothers truck and he has got about all he's going to get out of his setup so he may squeeze another tenth or two out this way. I have seen the propylene oxide work before and there is no turning to do just pour an go. I would like to see if that super blue 007 works. They said a 12% hp increase you put that on a calculator with your hp now plus 12% you are looking at 859 hp. So that would be like a 10lb bottle. BUT BEFORE YOU DO ANYTHING DO YOUR RESEARCH talk to the people and find out if its right for your engine set up. Have fun and keep it on all fours.