How to increase fuel efficiency in a Ford Mondeo?

I just got a new Ford Mondeo and I've noticed that it's not as fuel efficient as I was expecting. What are some tips or modifications I can make to improve its fuel efficiency?

One of the easiest things you can do to improve fuel efficiency is to regularly check and replace your air filter. A clean air filter allows for better air flow and can significantly improve your gas mileage.

Another tip is to use the recommended oil for your car. Using the wrong type of oil can affect your fuel efficiency and can even cause damage to the engine. It's worth investing in the right oil to save on gas in the long run.

Consider using a fuel additive that helps clean and maintain your engine. This can improve fuel efficiency and also reduce emissions, making your car more environmentally friendly.