How Long Can Double Iridium Spark Plugs Last?
3 Answers
Double iridium spark plugs can last for 3 to 5 years. The method for replacing double iridium spark plugs is as follows: 1. Remove the engine cover and unscrew the fixing screws of the high-voltage line terminal; 2. Remove the high-voltage line terminal, loosen the double iridium spark plug, then insert the soft tube on the high-voltage line terminal into the combustion chamber and pull out the spark plug; 3. Align the new double iridium spark plug with the screw hole and tighten it with a tool. Double iridium spark plugs are important components of the gasoline engine ignition system. Their function is to introduce the pulsed high-voltage electricity generated by the ignition coil into the combustion chamber, using the electric spark generated by the electrodes to ignite the mixed gas and complete combustion.
Let me share my personal experience with how long double iridium spark plugs last. I've used several sets of these spark plugs, and on average, they seem to last between 80,000 to 120,000 kilometers, roughly 5 to 8 years. However, this isn't set in stone—if you frequently accelerate hard or often get stuck in city traffic, the spark plugs will wear out faster. Environmental conditions also play a big role; for example, overheating in high-temperature areas or poor fuel quality can shorten their lifespan to around 60,000 kilometers. My last set lasted 90,000 kilometers before replacement, mainly because they provided stronger ignition and more stable fuel efficiency. I recommend regular maintenance, checking the spark plugs during every oil change, and addressing any issues early. Many people ignore the maintenance schedule recommended in the vehicle manual, which wastes performance potential.
For those with some knowledge of car parts, double iridium spark plugs have a lifespan of approximately 80,000 to 100,000 kilometers, designed to leverage the high durability of iridium metal. Driving habits play a crucial role: gentle starts and highway cruising can extend their life, while frequent starts or engine modifications accelerate wear. Vehicle models also make a difference, with older engines or turbocharged cars experiencing faster spark plug degradation. I've found that double iridium spark plugs last several times longer than standard copper ones, requiring fewer replacements, which translates to time and labor savings. Proper maintenance, such as keeping the air filter clean and using high-quality gasoline, can push the lifespan beyond 120,000 kilometers. Regularly checking the ignition system with diagnostic tools helps prevent mid-use failures.
