Home›Products›Engine & Fuel Systems›Fuel AdditivesFuel AdditivesWant to maximise fuel efficiency and avoid problems such as rough idling, weak acceleration, stumbling and stalling? STP® fuel additive products can help.Product Category Please selectEngine & Fuel SystemsFunctional FluidsProduct Type Please selectFuel AdditivesOil & Engine AdditivesSort by Please selectA to ZZ to ASort by Sort byA to ZZ to AFilterFilterProduct Type Engine & Fuel Systems Functional FluidsView ProductsView ProductFuel AdditivesPetrol Injector CleanerView ProductFuel AdditivesDiesel Injector CleanerView ProductFuel AdditivesComplete Fuel System Cleaner – PetrolView ProductFuel AdditivesPower BoosterView ProductFuel AdditivesPetrol TreatmentView ProductFuel AdditivesHigh Mileage Petrol Injector Cleaner