How do I improve the fuel efficiency of my Nissan Juke?

I recently purchased a Nissan Juke and have noticed that it is not as fuel efficient as I had hoped. What steps can I take to improve its fuel efficiency without sacrificing performance?

Regularly check and replace your air filter to ensure proper air flow to the engine.

Maintain proper tire pressure to reduce drag and improve gas mileage.

Avoid excessive idling and use cruise control on the highway to save gas.