How can I increase my Vauxhall Insignia's fuel efficiency?

I've noticed that my Vauxhall Insignia's fuel consumption has been higher than expected. What can I do to improve its fuel efficiency?

One way to improve your Vauxhall Insignia's fuel efficiency is by keeping up with regular maintenance, such as changing the air filter and spark plugs. These simple tasks can improve your car's overall performance and reduce fuel consumption.

Avoid idling for long periods of time and try to use cruise control when driving on the highway. These practices can help conserve fuel and improve your car's efficiency.

Consider using a fuel additive, such as a fuel system cleaner, to keep your car's engine running smoothly. This can help improve fuel efficiency and reduce emissions.