Additives are substances that are added to fuel or cooling water in small quantities to improve the performance of the machine.
The best-known additive at the moment is probably AdBlue which is added to diesel vehicles and minimizes combustion residues.
Additives can also be used for other purposes.
Here you will also find additives that are able to repair small leaks in the radiator or engine, or to clean them. All without a visit to the workshop.