STP Fuel Injector & Carburetor Cleaner is a professional-grade cleaning solution designed to restore engine performance and efficiency. This 12 oz. formula penetrates fuel injectors and carburetor deposits, removing carbon buildup that accumulates over time. By dissolving varnish and gum deposits, it helps improve fuel atomization, reduce emissions, and enhance throttle response. Ideal for both gasoline engines and carburetors, this cleaner restores lost horsepower and fuel economy while promoting smoother engine operation. Simply add to your fuel tank for convenient maintenance that keeps your engine running at peak performance.