How often should I change the spark plugs in my Ford Mondeo?

I've had my Ford Mondeo for a few years now and I'm wondering when it's time to change the spark plugs. Is there a specific mileage or schedule I should follow?

The general recommendation is to change the spark plugs every 30,000 miles or 3-5 years, whichever comes first. However, it's always a good idea to check your owner's manual for the specific maintenance schedule for your Ford Mondeo.

You may want to consider changing the spark plugs sooner if you notice any symptoms such as rough idling, difficulty starting the engine, or decreased fuel efficiency. These could be signs that your spark plugs need to be replaced.