How often should I change my Ford EcoSport's spark plugs?

I recently bought a Ford EcoSport and I'm wondering how often I should change the spark plugs in order to keep the engine running smoothly. Is it every 30,000 miles like the manual says or can I wait longer?

It's recommended to change the spark plugs every 30,000 miles as stated in the manual to ensure optimal engine performance.

Some people say they wait longer and have no issues, but it's better to stick to the recommended maintenance schedule to avoid potential problems down the road.

I personally change my spark plugs every 25,000 miles just to be safe. It's a small expense compared to the cost of major engine repairs.