How to improve gas mileage in my Vauxhall Insignia?

I just purchased a Vauxhall Insignia and noticed that the gas mileage is not as good as I expected. Are there any tips or modifications that can be done to improve the gas mileage?

You can try keeping your tires properly inflated, as underinflated tires can decrease gas mileage. Also, making sure your engine is properly tuned and using the recommended type of oil can improve gas mileage.

Another suggestion is to reduce excess weight in your vehicle, such as removing unnecessary items from the trunk. This can help improve gas mileage as well.

Driving at a steady pace and avoiding quick accelerations and sudden braking can also help improve gas mileage. Practice defensive driving techniques and plan your route to avoid excessive idling.