[Joy]

Hi, I have two cars and I have not change spark plug ever before for the below mentioned cars. Should I change the spark plug now?

- Mitsubishi Outlander - 9 yrs old - 80k mileage
- Toyota Aygo - 6 yrs - 32k mileage.

[Rolebama]

It depends on the type of plugs you currently have fitted. I have been told that NGK Iridium plugs are good for 100,000 miles regardless of time.