Fights deposit build-up and helps keep fuel injectors and carburettors clean in vehicles. Without cleaning, deposits can lead to hard starts, lost acceleration and rough idling. STP Fuel Injector & Carburettor Treatment is specially formulated to maintain clean performance of fuel injectors and carburettors by helping to prevent the accumulation of deposits. It's made with jet fuel, a high-quality carrier of active ingredients. STP FUEL INFECTOR CLEANER & CARB TREATMENT is safe for any PETROL engines.