What is the importance of regularly changing the spark plugs on a Ford Focus?

I've noticed my Ford Focus has been running rough lately. Could it be because I haven't changed the spark plugs in a while? What are the consequences of not changing them regularly? Any tips on when and how to replace them?

Yes, it is important to regularly change the spark plugs on your Ford Focus. Over time, they can become dirty or worn out, which can lead to issues with the engine's performance. If your car is running rough, it could be a sign that your spark plugs need to be replaced.

Not changing the spark plugs regularly can lead to decreased fuel efficiency, rough idling, and difficulty starting the engine. It's best to replace them every 30,000 miles or as recommended by your vehicle's manufacturer. You can easily replace them yourself with the right tools and instructions from your car's manual.

I recommend using high-quality, OEM spark plugs for your Ford Focus. They may be more expensive, but they will last longer and provide better performance. Make sure to check the gap on the new spark plugs before installing them, as it can vary depending on the brand.