All petrol engines (including GDI) fitted with a catalytic converter.
Pour the contents of one bottle in the fuel tank before filling it with petrol.
One bottle treats 40 to 60 litres of petrol.
Recommended use: one bottle every 5000 km.
In case one needs to pass MOT emission requirements use Catalyst Cleaner Premium in 20 to 30 litres of fuel and try to complete at least 20 to 30 minutes of driving at elevated RPM.