Originally Posted by 4vxc
Looks like the plugs are to hot and if anything its rich, forget the porcelain it has nothing to do with the mixture
How do you work out white plug electrodes are rich?? Common sense tells you a white electrode is lean.
With LRP the electrodes generally red/orange due to the additives.
With unleaded it's either white (lean), creamy colored correct mixture or black (rich).
Same goes for leaded fuel but since it's not available anymore it's not an issue.