i used it in both my mustangs and i think it helped out. put it in the pvc line that goes into your intake. use about half a bottle, and have a buddy keep the rpms around 2k. pour it slowly, shut it off for about ten minutes, then start her up and enjoy the smoke show. put the other half of the bottle in your gas tank.
i let the vacuum line suck it up then let it sit for a few minutes started it up and there was a decent amount of smoke, i didnt really notice anything.
I did it the way it suggests, 1/3 sucked thru vac line, 1/3 in oil, 1/3 in gas tank. definatly some strong stuff, if your worried about clogging fuel pump or oil passage just put 1/3 or 1/2 bottle thru vac lines. next time thats probably what I'll do.
I did it for the first time a couple of months ago. Had no experience other than what was discussed in search threads. Product worked fine for me. I don't really see too much a reason to be scared