How often should spark plugs be replaced in a new car?

[SanRyder]

The replacement interval for spark plugs in a new car depends on the material of the spark plugs: 1. Nickel alloy spark plugs should be replaced every 20,000 kilometers; 2. Iridium spark plugs should be replaced every 60,000 kilometers; 3. Platinum spark plugs should be replaced every 100,000 kilometers. The working principle of spark plugs is: under the control of the engine, the high-voltage electricity generated by the ignition coil is introduced into the engine cylinder, and a spark is generated between the gaps of the spark plug electrodes to ignite the mixed gas, ensuring the normal operation of the engine. The method for removing spark plugs: 1. Clean the dust and impurities around the spark plugs using compressed air or a soft tube to blow them away; 2. Ensure the engine is in a cold state before proceeding; 3. Protect the spark plug installation port immediately after removal to prevent impurities or dust from entering the cylinder; 4. Be careful not to damage the insulating porcelain body when using a wrench; 5. Do not bend or strike the center electrode when adjusting the spark plug gap.

[DiGemma]

The replacement interval for spark plugs in new cars generally depends on the owner's manual. Most manufacturers recommend changing them every 60,000 to 100,000 kilometers, depending on the vehicle model. For example, German cars may be designed to last longer, potentially exceeding 100,000 kilometers, while some Japanese brands suggest earlier replacement to prevent issues. As a user, I adhere to regular maintenance, checking the condition of spark plugs every two years, as prolonged neglect can lead to a chain of problems like ignition issues, increased fuel consumption, and even engine shaking. Don't skimp and push the limits—small components have a big impact, especially for new cars under warranty; follow the manual to avoid voiding claims. DIY replacement is straightforward, but visiting a professional shop is safer.

[Deborah]

From my driving experience, replacing spark plugs is closely related to driving habits. If you drive in stop-and-go city traffic every day, frequent starts and stops increase the load, causing spark plugs to wear out faster. It's recommended to check if replacement is needed every 30,000 km. On the contrary, if you drive mostly on highways, spark plugs can last longer, possibly up to 80,000 km before needing replacement. Poor road conditions or using low-quality fuel also accelerate aging. When my car was new, I had the ignition system checked by a technician every two to three years and adjusted the replacement cycle accordingly. This habit saves money and protects the car—don't wait until engine problems arise to regret it.

[OReese]

Spark plug replacement is actually a cost-effective investment. For new cars, the optimal replacement interval is around 50,000 kilometers. From a cost-saving perspective, delaying replacement may increase fuel consumption by over 10%, with the extra fuel cost far exceeding the few hundred yuan spent on replacement parts. Prioritizing cost-performance ratio, I opt for long-lasting platinum or iridium spark plugs—slightly more expensive but with doubled lifespan. Don't blindly follow manufacturers' maximum recommended intervals; taking early action prevents major repairs, lowers maintenance costs, and enhances driving smoothness.

[LeahLynn]

Spark plug performance directly affects a new car's power. After aging, unstable ignition can lead to weak acceleration, idle vibration, or difficulty starting. I pay attention to these signs and address them promptly, as delaying replacement may damage the catalytic converter, resulting in costly repairs. New cars typically recommend replacement every 60,000 kilometers, but this varies by brand—turbocharged vehicles, for example, require more frequent changes. Regularly inspect spark plug gaps and carbon buildup to maintain optimal engine operation.