What is the best oil viscosity for a Vauxhall Insignia?

I've been using 10W-40 in my Vauxhall Insignia, but I'm not sure if that's the best choice. Can anyone recommend a better oil viscosity for improved engine performance and fuel efficiency?

Hi Emma, for optimal engine performance and fuel efficiency, it's recommended to use 5W-30 synthetic oil in your Vauxhall Insignia. It's specifically designed for modern engines, and will provide better protection and improve performance.

Hey Emma, if you live in a warmer climate, you might want to consider using 10W-30 instead. It offers better protection against wear and tear at higher temperatures, but still provides great fuel efficiency.

Hi there Emma, I've been using 5W-40 in my Vauxhall Insignia and I've had great results. It's recommended for high-performance engines and provides excellent protection in all driving conditions.