How often should I change the spark plugs and air filter in my Kia Picanto?

I've been experiencing some rough idling and decreased fuel efficiency in my Kia Picanto. I've heard that changing the spark plugs and air filter can help with these issues. How often should I replace these parts and what should I look out for when doing so?

I would recommend changing your spark plugs and air filter every 30,000 miles or 3 years, whichever comes first. If you're experiencing rough idling and decreased fuel efficiency, it's definitely time to replace these parts.

As a general rule of thumb, it's best to check and replace your spark plugs and air filter every time you get an oil change. This ensures that your engine is running smoothly and efficiently.

In my experience, I've found that replacing the spark plugs and air filter every 50,000 miles works well for the Kia Picanto. However, make sure to regularly check these parts for any signs of wear and tear.