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STP® Super Concentrated Fuel Injector Cleaner is a DIY fuel injector cleaner that contains concentrated detergents that help dissolve and remove harmful carbon, gum, and varnish deposits on fuel injectors. Without cleaning, deposits can lead to hard starts, lost acceleration and rough idling. This product is made with jet fuel, a high-quality carrier of active ingredients.


Use every oil change or 4,000 miles.


  • 5.25 fl. oz. bottle treats up to 21 gallons of gasoline.


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