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Various circumstances such as engine conditions and driving conditions are rough measures for choosing a plug. For example, if strenuous driving is continued for a long time using normal plugs, the plug will overheat.
This is why the idea of a regular plug for a regular car doesn't work.
What's important is to inspect the condition of your current plugs, and then choose a plug accordingly.
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The heat range will change with the seasons.
| When the air temperature is high, as in the summer, the inlet air temperature becomes higher, increasing the load on the engine. In times like this, it's better to choose a plug with a higher heat range. |
The more horsepower is increased, the higher the required heat range.
| If the horsepower has been increased through tuning, the increase in explosive power leads to an increase in combustion chamber temperature, making pre-ignition more likely; in such cases it is necessary to choose a plug with a higher heat range and a higher level of heat resistance. |
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When using a plug with a terminal nut
| *When using a plug with a terminal nut, please tighten it securely with pliers or a similar tool. (This does not apply when the terminal nut is crimped on to the plug.) If the plug is used with a loose terminal nut, there is a chance this may lead to engine failure. |
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