Chris,
I did use TCP for a while when I was having plug fouling problems and it
does work.  However, after I learned how to properly shut down my engine, I
found that I really don't need it anymore.
When you are ready to shut down, run your engine up to about 1800 RPM for 30
to 60 seconds, then throttle back to idle and immediately (before the RPM
drops below 1300) yank the mixture to cut-off.  Also, leaning the mixture
while you are taxing back to the barn helps to solve the lead fouling
problems.
Bob Jude
N65BJ

>Does anyone have experience using TCP to help with those pesky chucks of
lead that like to accumulate in the lower plugs.  Does the stuff really
work?  Are there any drawbacks to its use?
Chris Zavatson
N91CZ
360 std
www.N91CZ.com