How often should I replace the spark plugs in my Vauxhall Zafira Life?

I have a Vauxhall Zafira Life and I'm wondering when is the right time to change the spark plugs. I've heard various opinions, some saying every 20,000 miles and others saying every 30,000 miles. What is your recommendation?

As a longtime Vauxhall Zafira owner, I recommend replacing the spark plugs every 30,000 miles. This ensures optimal performance and fuel efficiency.

I usually replace my spark plugs every 20,000 miles just to be safe. It's a relatively inexpensive maintenance task that can prevent bigger issues down the road.

I would suggest checking your owner's manual for the recommended interval for your specific Zafira model. It may vary based on the engine type.