How can I improve the fuel economy in my Vauxhall Insignia?

I have noticed that my Vauxhall Insignia consumes more fuel than expected. What are some tips and tricks to improve its fuel economy?

One of the easiest ways to improve fuel economy is to regularly check and replace your car's air filter. A dirty air filter can reduce fuel efficiency by up to 10%.

Try to drive at a constant speed and avoid sudden acceleration and braking. This can greatly improve your fuel economy.

Check your tire pressure regularly. Under-inflated tires can decrease fuel efficiency. It is also recommended to use low rolling resistance tires.

Avoid unnecessary idling and remove any unnecessary items from your car. The added weight can reduce fuel economy.