Diesel engines suffer from different problems to petrol ones. Injector deposits, waxing in cold weather and DPF soot build-up are the usual culprits behind rough running, smoke and poor economy.

Greyhound Auto Retail stocks diesel injector cleaners, fuel system treatments, anti-waxing and winter additives, cetane improvers and diesel system flushes. Each product states the tank size it treats and the recommended interval.

Regular small doses work better than one large treatment after symptoms appear. Nationwide delivery across South Africa.