|Are ' fancy ' plugs good ?
Question : What are the advantages of using those 'fancy' plugs such as
platinum, iridium, four ground electrodes (super four) etc.?
Answer : All these specialised plugs are manufactured for special
purposes such as competition, and unless the engine is highly tuned or has
special needs, there is no need to use anything other than what is
recommended by the manufacturer. Having said that, you sometimes may want to
move a step up or down in the heat range of that particular model of plug to
suit your driving or usage condi- tions. Of course four electrodes are
better than one, but if one can fire the mixture efficiently, why do you
need to spend more on a four-electrode plug?