How often should I change the spark plugs on my Kia Picanto?

I noticed a decrease in engine performance and was wondering if it's time to replace the spark plugs. How often should I do this for optimal engine function and fuel efficiency?

It is recommended to change your spark plugs every 30,000 miles or every 3 years, whichever comes first. This will ensure your engine is running at its best and will also save you money on fuel costs in the long run.

In my experience, it's best to keep an eye on the condition of your spark plugs and replace them when they start to show signs of wear and tear. This can vary depending on driving habits, but on average, it's a good idea to replace them every 50,000 miles.

I change my spark plugs every 20,000 miles to maintain peak engine performance. This may seem a bit excessive, but it has proven to be effective in preventing potential engine issues down the line.

I would recommend following the manufacturer's guidelines for spark plug replacement which is typically every 30,000 miles. However, if you notice any changes in engine performance, it is always a good idea to have them inspected sooner.