My car ran more than 70 thousand kilometers. Do I need to change the spark plug throttle?

The service life of ordinary spark plugs is about 4W kilometers, but this is not absolute, it depends on the use of vehicles and the quality of gasoline. When the vehicle has the following faults, it is necessary to check the spark plug: 1. After the spark plug works for a period of time, the electrode is excessively ablated, which will cause the vehicle power loss, weak acceleration, high fuel consumption, difficult starting, serious engine cylinder loss, vehicle jitter and even engine damage. 2. After replacing the new spark plug in time, the power loss of the vehicle can be reduced and the engine can output the original power. 3. The common aging phenomena of spark plugs are: carbon deposit or deposit; Electrode melting or corrosion. The outside of the spark plug does not look very aging, and the internal aging is irreversible.