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

I just bought a Ford Fiesta and I'm looking to save some money on gas. What steps can I take to improve its fuel efficiency?

Regular maintenance is key! Make sure to keep up with oil changes, tire pressure, and air filter changes. Also, try to avoid idling and driving at high speeds.

Consider using a fuel additive that can clean your engine and improve its efficiency. You can also try hypermiling techniques like coasting and using cruise control.

Upgrade your air intake and exhaust system for better air flow. You can also switch to eco-friendly fuel options like biofuels or electricity.