Which is Better: Iridium or Platinum Spark Plugs?

[DelaneyRose]

Iridium spark plugs are better. Differences between iridium and platinum spark plugs: Different melting points: iridium spark plugs have a higher melting point, while platinum spark plugs have a melting point slightly lower than iridium; different craftsmanship: the electrodes of iridium spark plugs can be made thinner; different performance: compared to platinum spark plugs, iridium spark plugs perform slightly better; different prices: platinum spark plugs have a melting point slightly lower than iridium, and their price is half that of iridium spark plugs, offering relatively better cost performance. Types of spark plugs: Spark plugs vary not only in shape and size but also come in three types: cold, medium, and hot. Generally, engines with high compression ratios and high speeds are suitable for cold-type spark plugs, while engines with low compression ratios and low speeds are suitable for hot-type spark plugs. Medium-type spark plugs are suitable for engines that fall between these two categories.