STP Ultra Diesel 400ml – Advanced Diesel System Cleaner & Performance Booster

STP Ultra Diesel 400ml deeply cleans diesel injectors, removes heavy carbon deposits, improves fuel efficiency, boosts engine performance, and reduces emissions. Ideal for cars, SUVs, trucks, and high-mileage diesel engines.

STP Ultra Diesel – 400ml

Achieve maximum diesel engine performance with STP Ultra Diesel 400ml. This advanced, high-strength formula is engineered to deliver a deep clean across the entire diesel fuel system—injectors, intake valves, combustion chambers, and fuel lines. It effectively removes stubborn carbon deposits, gum, and varnish that reduce engine efficiency and power.

STP Ultra Diesel is ideal for modern diesel engines, common rail systems, high-pressure injectors, and high-mileage vehicles. By restoring optimal fuel flow, it improves acceleration, enhances fuel economy, reduces exhaust smoke, and lowers harmful emissions. It also helps protect engine components from wear and corrosion, ensuring long-term reliability.

Whether you drive in city traffic or cover long distances, STP Ultra Diesel provides complete fuel system cleaning in just one tank.

Key Features:

• Deep cleans diesel injectors and entire fuel system

• Removes heavy carbon, gum, and varnish deposits

• Restores power, acceleration, and engine responsiveness

• Improves fuel efficiency and reduces emissions

• Reduces exhaust smoke and engine noise

• Suitable for modern diesel engines, common rail, and high-mileage vehicles

• Helps protect against corrosion and injector wear

• Easy-to-use 400ml bottle — add to a full tank for best results