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Message: <blockquote data-quote="xMika" data-source="post: 4394549" data-attributes="member: 89237">Actually Copper and Platinum spark plugs is more efficient compared to Iridium spark plugs. Iridium spark plugs are very dense metal, therefore it can produce a very small electrode tip that can last longer. But due to the small tip, the spark produced are small. To compensate this, they are gapped bigger, usually around 0.30mm to 0.35mm. Iridium is not a good electric conductor as well. Therefore more current is sucked from your car just to make this spark plug work. People choose to buy iridium spark plugs because its a hard metal, and can last longer, but not very good for performance.Now, for copper and platinum spark plugs. Both are very good electric conductor but the metal itself is not that hard, therefore it requires a bigger electrode tip to make it last longer. It its very efficient in producing bigger sparks, therefore it can be gapped closer, usually around 0.25mm to 0.28mm. Theres no such thing as turbo car must use iridium spark plugs. But for maximum performance and better pricing, go for platinum spark plugs. If your car is already running rich air fuel mixture, dont need to worry about hot ignition that will damage your engine internals because the fuel acts as lubricants and rich mixture keeps your engine cooler. Don't listen to seller alone. Try to do some research by yourself :D</blockquote>

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