How can I improve the fuel efficiency on my Volkswagen Arteon?

I've noticed that my Volkswagen Arteon's gas mileage is not as good as it used to be. As someone who is concerned about the environment and my wallet, what steps can I take to improve the fuel efficiency on my vehicle?

Regular maintenance is key to improving fuel efficiency. Make sure to get your oil changed, tires properly inflated, and air filter replaced on a regular schedule.

Consider your driving habits. Are you frequently accelerating and braking harshly? This can use up more gas. Try to drive more smoothly and anticipate stops to improve fuel efficiency.

Check your route. Are there any alternate routes with less traffic or stoplights? Avoiding traffic and stop-and-go driving can greatly improve fuel efficiency.

Consider using a fuel-saving device, such as a fuel additive or fuel economy chip. These can help improve your vehicle's gas mileage.