The most damaging flaw in these plugs is the low-quality center electrode. NGK electrodes are iridium. The dupes, though, are so crappy that they actually melt during an engine’s normal ...

The spark plug candle was fashioned out of a single ... The inside was bored out to create space for the wick and oil, and then the electrode was installed just above the flame.

Cleaning spark plugs can be a quick fix to restore efficiency without immediate replacement. how to clean spark plugs ...

Spark plugs, which screw into the top of an engine ... The right type of plug and the size of the gap between the electrodes at the tip are specified by the automaker, and using the right ...