Plug heat ranges

[Keith Walker <100662.3423@domain.elided>]

>>He also goes on to say that
especially with older cars, its better to use a plug that's too hot
than one that is too cold. He says that a plug that's too hot might not
last very long before it needs re-gaping but it will NEVER hole a
piston the way a too-cold plug will.<<

I would think that a too hot plug is the one that is likely to hole
a piston. The hotter plugs have more insulation to stop the heat
getting from the combustion chamber.

What am I missing?

All the best

Keith
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