Why does my Vauxhall Corsa's engine make a knocking sound?

I've noticed that my Vauxhall Corsa's engine has been making a knocking sound whenever I accelerate. What could be causing this and how can I fix it?

This could be a sign of worn engine bearings or incorrect oil viscosity. It's important to get this checked by a mechanic as soon as possible to avoid further damage to your engine.

It's possible that your spark plugs or ignition timing could be causing the knocking sound. Have them checked and adjusted if needed.

Have you recently filled up with low quality or contaminated fuel? This could also be a cause of the knocking sound. Try using a fuel additive and see if that helps.