Iridium Spark Plug Vs 'Normal' Spark Plug – What's The Difference?

There are three types of spark plug – iridium, platinum/rhodium, and copper – and all work in the same way, so what makes them different?
Spark plugs play an essential role in gas ignition engines by generating an electric spark across a small ignition gap, that fires a combustion chamber and powers the engine. There are three types of spark plug – iridium, platinum/rhodium, and copper – and all work in the same way, so talking about the difference between iridium and ‘normal’ spark plugs is somewhat misleading. The only real difference is the metal used to create the central electrode.

Do performance spark plugs make a difference? - Quora

Difference Between Iridium And Normal Spark Plugs »

IRIDIUM TT – DENSO SPARK PLUG

Reading Spark Plugs Color

5 Things Every Driver Should Know About Spark Plugs

sparkplugs - How to assess iridium spark plugs? - Motor Vehicle Maintenance & Repair Stack Exchange

TICANEE Iridium Spark Plugs and Wires Set for Chevy

Change Spark Plug Iridium Spark Plug Vs Normal Spark Plug

Denso Iridium Spark Plugs Evo 8

NGK Laser Iridium Spark Plug, 1-pk

R&M Walsh on LinkedIn: What Are The Differences Between Iridium And Platinum Spark Plugs?

Understanding The Different Types Of Spark Plugs