How can I improve the efficiency of my Ford Fiesta engine?

I have noticed that my Ford Fiesta engine is running a bit sluggish lately. What are some tips and tricks to improve its efficiency and increase overall performance?

One of the simplest ways to improve engine efficiency is to regularly change your oil and air filter. This will ensure that your engine is running smoothly and efficiently. Also, make sure to use the recommended grade of oil for your specific Ford Fiesta model.

Another tip is to maintain proper tire pressure. Under-inflated tires can cause your engine to work harder, decreasing fuel efficiency. Check your owner's manual for the correct tire pressure for your vehicle.

Consider upgrading to a higher octane gasoline. This can improve engine power and efficiency, but make sure to check your vehicle's manual to see if it is recommended for your specific model.