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.

Denso Iridium Spark Plugs Evo 8

Spark Plug replacement - All you need to know from the experts at

Differences Between Iridium and Platinum Spark Plugs

Bad Spark Plug Symptoms - How to Check Spark Plugs - AutoZone

Choosing The Correct Spark Plug For Your MINI

The best spark plugs of 2024

Best Motorcycle Spark Plugs

Spark Plugs- 2004-2006 Pontiac GTO - Mark Quitter Racing

Normal Spark Plug Vs Iridium Spark Plug Which Is Better Advantage

NGK Laser Iridium Spark Plug, 1-pk

Spark plugs tips length different from oems. : r/Volvo

Normal Spark Plug vs Iridium Spark Plug In Tamil

Generac Spark Plug for Air-Cooled and Portable Generators

Spark Plug

Brisk Racing Spark Plugs - 5cyl · IROZ MOTORSPORT

Spark Plugs and How they Affect your BMW

CHAMPION 71ECO QC12YCX (RC12YC) 5/8-in Small Engine Spark Plug in