How to improve the overall performance of my Ford S-Max's engine?

I have noticed a decrease in power and acceleration in my Ford S-Max, what can I do to improve its engine performance?

First, make sure to regularly change your engine oil and filter to keep it running smoothly. Additionally, consider getting a fuel system cleaning to remove any buildup that may be affecting your engine's performance.

You can also try adding a fuel additive to your gas tank to help improve engine performance. Just make sure to follow the instructions carefully.

Another option is to upgrade your spark plugs and ignition system, which can provide better fuel combustion and increase horsepower.

If you're still experiencing issues, it may be time to bring your S-Max to a mechanic for a more thorough inspection and potential repairs.