What are the consequences of using incorrect spark plug models?

[JuneLee]

The consequences of using incorrect spark plug models include engine knocking and overheating, which can lead to unstable engine speed or weak driving performance. The service life of resistor spark plugs is 20,000 kilometers, platinum spark plugs last for 40,000 kilometers, and iridium spark plugs can reach 60,000 to 80,000 kilometers. If you notice increased fuel consumption in your vehicle, consider replacing the spark plugs. In spark plug standards, the heat value is typically used to characterize the thermal properties of spark plugs. The heat value of a spark plug indicates the balance between heat absorption and dissipation at the insulator skirt. A higher heat value means stronger heat absorption and dissipation balance capability. Therefore, hot-type spark plugs have lower heat values, while cold-type spark plugs have higher heat values.

[DeNora]

Using the wrong spark plug model can bring a bunch of troubles. Having worked in car repair for years, I've seen many car owners casually replace spark plugs, only to end up with their cars shaking like an earthquake. Poor ignition leads to engine misfires, immediately causing fuel consumption to spike by 20%, along with black smoke, like a double whammy of burning money and fuel. The worst part is it might damage the ignition coil or even the valves, and if left unchecked, repairs could cost thousands—totally not worth it. It's advisable to always check the vehicle manual when replacing them, avoid buying the wrong model just to save a few bucks, and regular checks can save you a lot of unnecessary expenses.

[LaJanelle]

That time I got the wrong spark plug model really gave me a hard time. I was used to driving to and from work, and once I tried changing them myself with mismatched ones, the car immediately acted up. Acceleration was sluggish when stepping on the gas, and it frequently stalled halfway, with fuel consumption jumping from 8 liters per 100 km to 10 liters—wasting money and time. Later, a professional shop check revealed prolonged use would increase carbon buildup and affect emissions. Now I strictly follow the manual—choosing the right spark plugs is the smart move.

[OMolly]

When I first started learning about cars, I thought spark plugs could be replaced randomly. It turned out to be a joke when the wrong model was installed. After putting them in, the car had difficulty starting—it would clatter a few times before barely turning over, and halfway down the road, the engine shook violently. The mechanic said the incorrect ignition gap and mismatched heat range would cause overheating and shorten the engine's lifespan. I should have checked the correct model from the start instead of messing around like I did.