Additives are not a substitute for maintenance, but the right one solves a specific problem cheaply. A fuel system cleaner helps a car that has been idling around town on short trips, a cooling system additive can buy time on a slow leak, and a flush is worth doing before an oil change on a neglected engine.

Greyhound Auto Retail stocks petrol and diesel additives, cooling system additives, engine and transmission flushes, stop leak, stop smoke and transmission treatments. Each product lists its dosage and the tank or sump size it treats.

Match the additive to the actual symptom rather than adding several at once, and follow the dosage on the bottle. If you describe what the car is doing we will suggest which one is relevant. Nationwide delivery across South Africa.