STP Direct Injection Fuel System Cleaner 6/12 Fo is a high-performance fuel additive designed to clean and protect direct injection gasoline engines. Formulated to remove carbon deposits and varnish from fuel injectors, intake valves, and combustion chambers, it helps restore engine power, smooth acceleration, and optimal fuel efficiency. Regular use reduces engine knocking, hesitation, and emissions while improving overall vehicle performance.
This powerful cleaner is easy to use—simply pour the recommended amount into a full tank of gasoline and drive normally. STP’s advanced formula penetrates and dissolves stubborn carbon buildup, preventing future deposits and maintaining a clean fuel system over time. Safe for all vehicles with direct injection engines, it delivers professional-grade results without harming engine components or fuel system parts.
Ideal for everyday drivers, performance enthusiasts, and professional mechanics, STP Direct Injection Fuel System Cleaner helps maintain peak engine efficiency, prolongs engine life, and reduces the risk of costly repairs. Compact and convenient, the 6-ounce bottle provides an easy solution for routine maintenance or preemptive care, ensuring reliable performance, smoother driving, and cleaner emissions from your vehicle.