Jim, I remember when that kind of stuff became a rage in the 60's. and
everybody seemed the need to try it, even though they would probably
never see any results of it makeing your car get better fuel milage, or
engines lasting any longer.

I put it in my car a couple times, because it was recomended by Andy's
commercials. I never knew if it did any good or not.

I used it some in my first car, a second wore out hand-me-down 63
Impala rust bucket

Which changed its oil on its own. whether on the street, or through the
exhaust....

JimH wrote:
3 little letters got your attention. Been around forever. ;-)

http://www.stp.com/rd.html

When was the first time you used it?