This STP® formulation contains the second highest level of detergents of any STP® formula. It helps clean your entire fuel system to restore its optimum operating condition. The advanced formula helps clean fuel injectors, carburetors, intake valves and ports, combustion chambers, cylinder heads and piston tops. It contains jet fuel, a high-quality carrier of active ingredients.
On average, adding STP® Complete Full System Cleaner to a dirty engine, running only one tanks worth of fuel, cleans 60% from the intake valve deposits from the dirty engines. After treatment, injector flow has been restored to 95% of the original flow rate.