What is the Difference Between Platinum and Iridium Spark Plugs?

[Duane]

The differences between platinum and iridium spark plugs are as follows: 1. Iridium spark plugs have a higher melting point, allowing the electrodes to be made thinner. Compared to platinum spark plugs, iridium spark plugs offer slightly better performance. 2. Platinum spark plugs have a melting point slightly lower than iridium, and their price is about half that of iridium spark plugs, making them relatively cost-effective. Here is more information about automotive spark plugs: 1. Spark plugs are crucial components in the ignition system of gasoline engines. They introduce high-voltage electricity into the combustion chamber and generate a spark by jumping the electrode gap, thereby igniting the combustible air-fuel mixture in the cylinder. They mainly consist of a terminal nut, insulator, terminal stud, center electrode, side electrode, and shell, with the side electrode welded to the shell. 2. Commonly known as spark plugs or "fire mouths," their function is to release the pulsed high-voltage electricity delivered by the high-tension leads (spark plug wires), breaking down the air between the two electrodes to produce an electric spark that ignites the gas mixture in the cylinder.