How Often Should Car Engine Spark Plugs Be Replaced?
3 Answers
Ordinary car spark plugs typically need replacement every 30,000 kilometers. Below are the replacement intervals for spark plugs made of different materials: 1. Standard copper-core spark plug replacement interval: 30,000 kilometers. 2. Yttrium-enhanced spark plug replacement interval: 50,000 kilometers. 3. Gold spark plug replacement interval: 80,000 kilometers. 4. Iridium spark plug replacement interval: 100,000 kilometers. 5. Platinum-iridium alloy spark plug replacement interval: 120,000 kilometers. Key considerations when selecting spark plugs include: 1. Spark plugs must be replaced as a complete set. 2. Precious metal spark plugs have higher melting points, better resistance to high temperatures and pressures, and superior quality. As a result, they produce stronger and more stable sparks and have longer service lives. 3. Spark plugs are categorized by the number of electrodes: single-electrode, double-electrode, triple-electrode, and quadruple-electrode. The higher the number of electrodes, the better the ignition performance. 4. When purchasing spark plugs, ensure the heat range indicated on the spark plug matches the vehicle's specifications.
The replacement interval for car spark plugs really depends on driving habits. Generally speaking, nickel alloy spark plugs need inspection at around 20,000 to 30,000 kilometers, platinum ones can last up to about 40,000 kilometers, while iridium ones are the most durable and can go over 60,000 kilometers. However, for someone like me who frequently drives in urban areas with lots of idling in traffic jams, you can actually feel the acceleration getting sluggish before even hitting 30,000 kilometers. Once I was too lazy to replace them, and the engine shook like it was dancing during cold starts. Now, at every maintenance check, I ask the mechanic to measure the gap; if it exceeds 0.8 millimeters, I replace them immediately. After all, a new spark plug only costs a few hundred bucks, which is much better than breaking down halfway.
I remember last time at the 4S shop for maintenance, the technician said checking spark plug condition is more reliable than rigidly following mileage intervals. Nickel alloy spark plugs have shorter lifespans, especially with frequent highway driving where electrode wear accelerates. My car uses iridium spark plugs which lasted 70,000 km over 5 years before replacement. But my friend's vehicle that often drives mountainous roads had its spark plug ceramic insulator crack at just 30,000 km. Recommendation: Judge based on usage scenarios - short-trip drivers should watch for carbon buildup, while those in hot climates need frequent inspections. Also, never compromise on fuel quality - I've learned firsthand how substandard gasoline accelerates spark plug degradation.
