What are the effects of changing spark plugs in a car?
2 Answers
Benefits of changing spark plugs: more complete ignition, fuel saving, better exhaust indicators. Replacement cycle introduction: 1. Resistor spark plugs: Resistor spark plugs need to be replaced after driving 20,000 kilometers; 2. Platinum spark plugs: Platinum spark plugs need to be replaced after driving 40,000 kilometers; 3. Iridium spark plugs: Iridium spark plugs need to be replaced after driving 60,000 to 80,000 kilometers. 4. Other situations: If you find that the fuel consumption of the vehicle increases, you can consider whether to replace the spark plugs. Generally, repair shops will recommend replacement every 20,000 to 30,000 kilometers, because although the spark plugs are not completely damaged at this time, their performance has declined.
I just changed my spark plugs, and the driving experience is immediately different! Before, the car always had trouble starting, especially in winter when it was hard to ignite. After the replacement, it starts smoothly with just a turn of the key, and no more shaking. The throttle response is much quicker now—stepping on the gas gives an instant push, making overtaking easier. To my surprise, fuel consumption has also dropped. Using an app to track it, I found I'm saving 0.5 liters per 100 kilometers, which adds up to significant savings on long highway trips. When spark plugs age and fail to ignite properly, incomplete fuel combustion leads to carbon buildup, harming the engine. That's why replacing them every 30,000 km is crucial. Platinum or iridium plugs last longer—though pricier, they're cost-effective in the long run. Pay attention to ignition sounds while driving; if you hear a slight hissing noise from the engine, get them checked and replaced promptly to avoid frequent breakdowns and engine damage.
