"C J Campbell" wrote in message
...
[...] I suspect that
the detonation and premature ignition that result from your
recommendations
are even harder on an engine than occasionally clearing a spark plug.

Here's an even better link to clear up the confusion:

http://www.sacskyranch.com/deton.htm

And I always wondered why combustion chambers in angle-valve engines were so
clean. I just learned some of the reasons why. They burn cleaner.